Understanding DNA test results for Berber populations, decoding Sardinian proxies, European components, and the limits of commercial testing
Commercial DNA tests like 23andMe, AncestryDNA, and MyHeritage provide North Africans with fascinating insights into their ancestry, but interpreting these results requires understanding how each company's algorithm works. For Amazigh (Berber) populations, particularly Kabyles, the results often include surprising categories like "Sardinian," "Iberian," or "Italian" that actually reflect ancient genetic layers rather than recent admixture. This guide explains what these results really mean.
1. The Amazigh Genetic Foundation
The Amazigh/Berber peoples represent one of the most genetically distinctive populations in the Mediterranean world. Modern genetic research, particularly ancient DNA studies from 2023-2025, has revealed that Amazigh ancestry consists of multiple deep layers accumulated over millennia:
| Ancestral Layer | Time Period | Contribution | Genetic Signature |
|---|---|---|---|
| Indigenous North African | >15,000 years ago | 40-70% | Deep African lineage distinct from sub-Saharan; related to Taforalt/Iberomaurusian |
| Neolithic European (EEF) | ~7,500-5,000 BCE | 15-30% | Cardial farmers from Iberia via Gibraltar; appears as "Sardinian" on MyHeritage |
| Neolithic Levantine | ~6,000-4,000 BCE | 5-15% | Middle Neolithic pastoralists; distinct from later Arab admixture |
| Historical Mediterranean | Roman-Byzantine-Medieval | 5-15% | Roman, Vandal (minimal), Byzantine, Andalusian contributions |
| Sub-Saharan African | Various periods | 5-15% | Trans-Saharan trade routes; higher in southern populations |
| Arab-Islamic | 641 CE onwards | 5-20% | Arabian Peninsula ancestry; variable by region |
2. Decoding Your DNA Test Results
2.1 23andMe Results Analysis
23andMe uses modern reference populations to classify ancestry. For a typical Algerian (Kabyle or otherwise), results often show:
| 23andMe Category | Typical Range | What It Actually Represents |
|---|---|---|
| North African | 70-95% | Indigenous Amazigh + absorbed ancient Eurasian layers |
| Arab, Egyptian & Levantine | 5-15% | Mix of ancient Levantine Neolithic AND post-Islamic Arab admixture |
| Peninsular Arab | 2-8% | Arabian Peninsula ancestry (Banu Hilal, Islamic period) |
| Egyptian | 2-5% | Ancient Nile Valley connections, not necessarily recent |
| Sub-Saharan African | 5-15% | Trans-Saharan connections; West African predominates |
| Southern European (trace) | 0-3% | Usually Byzantine/Roman period or Andalusian |
2.2 MyHeritage Results Analysis
MyHeritage uses a different methodology that often reveals the Neolithic European layer more explicitly. A typical Algerian result might show:
| MyHeritage Category | Typical Range | What It Actually Represents |
|---|---|---|
| North African | 50-75% | Core indigenous Amazigh ancestry |
| Iberian | 15-30% | ?? NOT recent Spanish ancestry! This is Neolithic European Farmer (EEF) ancestry from ~7,000 years ago |
| Sardinian | 5-15% | ?? This is a proxy for ancient Neolithic ancestry, Sardinians preserved EEF ancestry better than any other modern population |
| Italian | 2-8% | May include Roman/Byzantine period + Neolithic spillover |
| Greek | 0-5% | Likely Byzantine period ancestry (533-698 CE) |
| West African | 2-5% | Trans-Saharan connections |
Modern Sardinians are the closest living relatives of the Early European Farmers (EEF) who spread across the Mediterranean during the Neolithic. When MyHeritage shows "Sardinian" ancestry for a North African, it's detecting the ancient Neolithic European component that arrived via Iberia ~7,000 years ago, NOT recent Sardinian immigration. Sardinia simply serves as the best modern proxy for this ancient ancestry because Sardinians remained relatively isolated and preserved this genetic signature.
2.3 AncestryDNA Results Analysis
AncestryDNA provides regional breakdowns within North Africa and may show:
| AncestryDNA Category | Typical Range | What It Represents |
|---|---|---|
| Northern Africa (total) | 85-95% | Combined Amazigh + ancient absorbed layers |
| Algerian | 30-50% | Regional Algerian genetic signature |
| Moroccan | 20-40% | Western Maghreb connections |
| Tunisian | 10-20% | Eastern Maghreb connections |
| Egyptian | 3-8% | Nile Valley connections |
| Levant | 2-8% | Ancient Levantine + Arab period admixture |
| Spain | 0-3% | Andalusian/Morisco + ancient Neolithic traces |
3. The Neolithic European Component: A Closer Look
The most misunderstood aspect of North African DNA results is the European component. Many Amazigh people are surprised to see Iberian, Sardinian, or Italian ancestry and assume recent European admixture. In reality, most of this reflects a 7,000-year-old migration event.
3.1 What Ancient DNA Tells Us
A landmark 2023 study (Simões et al., Nature) sequenced ancient genomes from Early Neolithic Morocco and found:
- At Kaf Taht el-Ghar (Morocco, ~7,350 years ago): Individuals had ~72% Anatolian Neolithic ancestry and ~10% Western European Hunter-Gatherer ancestry
- This ancestry came from Iberian Cardial farmers who crossed the Strait of Gibraltar
- Local Amazigh populations rapidly adopted farming technology, with some sites (like Ifri n'Amr o'Moussa) showing cultural adoption without genetic replacement
MyHeritage's algorithm detects this ~7,000-year-old Neolithic ancestry and matches it to the closest modern populations that preserved it: Iberians (geographically closest) and Sardinians (genetically closest to ancient EEF). This is NOT evidence of recent Spanish or Italian ancestry, it's evidence of the Neolithic migration that helped transform North Africa from hunter-gatherer to farming societies.
3.2 Regional Variation in Neolithic Ancestry
A 2025 study (Lipson et al., Nature) revealed striking differences between western and eastern Maghreb:
| Region | Neolithic European Ancestry | Indigenous Persistence |
|---|---|---|
| Coastal Morocco | ~70-80% | ~20-30% |
| Interior Morocco/Atlas | ~40-60% | ~40-60% |
| Coastal Algeria (Kabyle) | ~30-50% | ~50-70% |
| Eastern Algeria/Tunisia | ~10-20% | ~80-90% |
| Sahara/Libya | ~5-10% | ~90-95% |
This explains why Kabyle Berbers often show moderate European components on DNA tests, they carry significant Neolithic ancestry but also preserved more indigenous North African ancestry than coastal Moroccan populations.
4. The Vandal Question: Minimal Genetic Impact
A common misconception is that European ancestry in North Africans comes from the Vandal Kingdom (429-534 CE). The historical and genetic evidence suggests otherwise:
4.1 Historical Context
- The Vandals (a Germanic tribe) conquered Roman North Africa in 429 CE
- Estimates suggest ~80,000 Vandals (including women and children) crossed from Spain
- They ruled for about 100 years before Byzantine reconquest
- The Vandal elite were eventually absorbed into the local population
4.2 Why Minimal Genetic Trace?
| Factor | Impact on Genetic Legacy |
|---|---|
| Population size | ~80,000 Vandals vs. millions of North Africans = <2% demographic impact |
| Duration | Only ~100 years of rule, insufficient for widespread admixture |
| Social structure | Vandals maintained separate Arian Christian identity, limiting intermarriage |
| Genetic similarity | Vandals already carried significant EEF ancestry, making them hard to distinguish from earlier Neolithic input |
| Byzantine absorption | After 534 CE, remaining Vandals were absorbed into Byzantine administration |
5. The Byzantine Layer: Hidden in Plain Sight
The Byzantine reconquest (533-698 CE) is often overlooked but may have left a more significant genetic trace than the Vandals:
5.1 Byzantine Presence
- Justinian's armies reconquered North Africa in 533-534 CE
- Byzantine rule lasted ~165 years (longer than Vandal rule)
- Major garrisons in Carthage, Leptis Magna, Tripoli, and Alexandria
- Significant Greek-speaking population in urban centers
- Intermarriage with local elites was common
5.2 Where Byzantine Ancestry Hides on DNA Tests
Byzantine ancestry in North Africans typically appears under several categories:
| DNA Test Category | May Include Byzantine Ancestry? |
|---|---|
| Italian (MyHeritage) | Yes, Byzantine Italians from Ravenna, Sicily |
| Greek (MyHeritage) | Yes, direct Byzantine Greek ancestry |
| Anatolian/Turkish | Yes, Byzantine Anatolia before Turkish conquest |
| Broadly Southern European | Yes, Mediterranean Byzantine admixture |
| Egyptian (AncestryDNA) | Partially, Byzantine Egypt (Coptic) influence |
6. Kabyle-Specific Genetic Profile
The Kabyle Berbers of northern Algeria (particularly the mountainous regions of Tizi Ouzou, Béjaïa, and Bouira) have a distinctive genetic profile within the Amazigh world:
6.1 Typical Kabyle DNA Breakdown
| Component | Kabyle Average | Other Maghrebi Average |
|---|---|---|
| Indigenous North African | 50-70% | 40-60% |
| Neolithic European (EEF) | 20-35% | 15-30% |
| Arab/Levantine | 5-15% | 15-30% |
| Sub-Saharan African | 5-12% | 8-20% |
| Byzantine/Mediterranean | 3-8% | 2-5% |
6.2 Why Kabyles Show Higher European Ancestry
Several factors explain the elevated European/Neolithic component in Kabyle populations:
- Geographic position: Northern coastal Algeria received maximum Neolithic migration from Iberia
- Mountain isolation: The mountainous terrain preserved genetic distinctiveness and limited later Arab admixture
- Roman/Byzantine presence: Major urban centers (Iol Caesarea/Cherchell, Saldae/Béjaïa) had significant Roman and Byzantine populations
- Reduced Arab penetration: Mountain regions were less affected by Arab-Islamic migration than coastal plains
6.3 Y-DNA and mtDNA Patterns
Kabyle uniparental markers show distinctive patterns:
| Haplogroup | Frequency in Kabyles | Origin/Significance |
|---|---|---|
| E-M81 (Y-DNA) | 50-70% | Indigenous North African; "Berber marker" |
| E-M78 (Y-DNA) | 10-20% | Northeastern African origin |
| J1 (Y-DNA) | 5-15% | Arab/Levantine; lower than Arab populations |
| J2, G2a, R1b (Y-DNA) | 5-10% | Neolithic European farmers + later Mediterranean |
| U6 (mtDNA) | 15-25% | Indigenous North African matrilineage |
| H, HV, JT (mtDNA) | 40-60% | Eurasian lineages; Neolithic + later input |
| L (mtDNA) | 15-25% | Sub-Saharan African matrilineages |
7. Comparing DNA Testing Companies
7.1 Methodology Differences
| Company | Reference Populations | Strengths | Limitations for North Africans |
|---|---|---|---|
| 23andMe | Modern populations | Good sub-Saharan African breakdown; detailed regional assignments | Absorbs Neolithic European into "North African"; may underestimate European component |
| MyHeritage | Mixed modern/historical | Reveals ancient Neolithic layer as Iberian/Sardinian | May overestimate European; "Sardinian" confuses users |
| AncestryDNA | Modern populations | Good regional Maghrebi breakdown (Algerian, Moroccan, Tunisian) | Limited ancient ancestry detection |
| FTDNA | Modern + ancient | Y-DNA and mtDNA haplogroup analysis | Autosomal less detailed than competitors |
7.2 Example: Same Person, Different Results
Based on the uploaded test results, here's how the same Algerian individual might appear across platforms:
| Category | 23andMe | MyHeritage | AncestryDNA |
|---|---|---|---|
| North African | 89% | 72% | 95% (regional breakdown) |
| European (visible) | 0% | 28% (Iberian + Italian) | 1% Spain |
| Arab/Levantine | 10% | , | 6% |
| Sub-Saharan African | 11% | ~3% | 3% |
8. Common Misconceptions Addressed
? "My Iberian/Sardinian ancestry means I have recent Spanish/Italian ancestors"
Reality: For most North Africans without documented European ancestry, Iberian/Sardinian results reflect 7,000-year-old Neolithic farmers who crossed the Mediterranean, not recent immigration. Sardinians are used as a proxy because they best preserved this ancient genetic signature.
? "My European ancestry must be from the Vandals"
Reality: The Vandals ruled for only ~100 years with a small population (~80,000). Their genetic impact was minimal and largely indistinguishable from the much larger Neolithic contribution. Your European ancestry is predominantly Neolithic, not Germanic.
? "23andMe shows no European ancestry, so I have none"
Reality: 23andMe's algorithm absorbs ancient European ancestry into the "North African" category. This doesn't mean you lack European ancestry, it means it's been present for so long (~7,000 years) that the algorithm considers it part of the North African genetic signature.
? "My Arab ancestry shows I'm not really Berber"
Reality: Most North Africans carry some Arab/Levantine ancestry from the Islamic period. Having 5-15% Arab ancestry is completely normal for Amazigh populations and doesn't diminish Berber identity, cultural and linguistic identity is separate from genetic ancestry.
? "The Italian/Greek on my results is from recent immigration"
Reality: Unless you have documented Italian/Greek ancestors, small percentages (2-5%) likely reflect Byzantine period (533-698 CE) or even Roman period admixture, not recent immigration.
9. Academic References
The following studies provide the scientific foundation for understanding Amazigh genetics:
- Simões LG, et al. (2023), "Northwest African Neolithic initiated by migrants from Iberia and Levant." Nature 618:550-556. DOI: 10.1038/s41586-023-06166-6
- Salem TJ, et al. (2025), "Ancient DNA from the Green Sahara reveals ancestral North African lineage." Nature. DOI: 10.1038/s41586-025-08793-7
- Lipson M, et al. (2025), "High continuity of forager ancestry in the Neolithic period of the eastern Maghreb." Nature 641:925-931. DOI: 10.1038/s41586-025-08699-4
- Colombo G, et al. (2025), "The origin of modern North Africans as depicted by a massive survey of mitogenomes." Scientific Reports 15:12209. DOI: 10.1038/s41598-025-12209-x
- Ringbauer H, et al. (2025), "Punic people were genetically diverse with almost no Levantine ancestors." Nature 643:139-147. DOI: 10.1038/s41586-025-08913-3
- Fregel R, et al. (2018), "Ancient genomes from North Africa evidence prehistoric migrations to the Maghreb from both the Levant and Europe." PNAS 115(26):6774-6779. DOI: 10.1073/pnas.1800851115
- Loosdrecht M, et al. (2018), "Pleistocene North African genomes link Near Eastern and sub-Saharan African human populations." Science 360(6388):548-552. DOI: 10.1126/science.aar8380
- Henn BM, et al. (2012), "Genomic Ancestry of North Africans Supports Back-to-Africa Migrations." PLoS Genetics 8(1):e1002397. DOI: 10.1371/journal.pgen.1002397
- Serra-Vidal G, et al. (2019), "Heterogeneity in Palaeolithic Population Continuity and Neolithic Expansion in North Africa." Current Biology 29(22):3953-3959. DOI: 10.1016/j.cub.2019.09.050
- Marcus JH, et al. (2020), "Genetic history from the Middle Neolithic to present on the Mediterranean island of Sardinia." Nature Communications 11:939. DOI: 10.1038/s41467-020-14523-6
10. Conclusions: Understanding Your Amazigh Heritage
DNA tests provide a window into the rich genetic history of the Amazigh peoples, but they must be interpreted with knowledge of what each category actually means:
- The "North African" category on most tests represents the indigenous Amazigh ancestry combined with ancient admixture that occurred before historical records
- "Sardinian" and "Iberian" on MyHeritage are proxies for Neolithic European Farmer (EEF) ancestry that arrived ~7,000 years ago via Gibraltar, not evidence of recent European ancestors
- The Vandals left minimal genetic traces due to their small numbers and short rule; your European ancestry is predominantly Neolithic
- Byzantine ancestry may be hidden in "Italian," "Greek," or even "Broadly Southern European" categories
- Arab/Levantine ancestry in Amazigh populations is normal (5-20%) and reflects the Islamic period; having it doesn't diminish Berber identity
- Different companies give different results because they use different reference populations and algorithmic choices, none is "wrong," they simply emphasize different aspects of your ancestry
Data sources: 23andMe, MyHeritage, AncestryDNA test results; published academic studies; ExploreYourDNA project.