What is the non-regional outside admixture layer?

Even for people fully from the North Sea world, the model includes Ashkenazi Jewish, European, East Asian and West African proxies. This gives any real non-regional ancestry an escape valve instead of being force-fit onto the wrong regional population.

⚓ New report · North Sea Germanic

Nordsee

Your North Sea Germanic Roots

From Anglo-Saxon England to the Viking fjords. We model your DNA against the ancient regional core (native British/Dutch/Danish Iron Age, Roman Britain, the Anglo-Saxon migration, the Viking Age, Frisian Saxon, Anglo-Norman) and non-regional outside admixture, then show which of 8 communities you most resemble, with an AI narrative.

⚔️ Ancient regional core (Iron Age Britain, Roman Britain, Anglo-Saxon, Viking Age)
🌍 Non-regional outside admixture layer (European, East Asian, Amerindian)
⚓ 8 North Sea communities compared directly
🧬 Y-DNA & mtDNA haplogroup classification
📊 Deep / Bronze Age / Iron Age / Classical / Medieval period breakdowns
🤖 Results interpreted by Claude AI

⚠️ Designed for people of predominantly North Sea Germanic ancestry. Works for any of the 8 communities: English (Kent), Dutch, Frisian, Flemish, Danish, Norwegian, Swedish, and North German. If you are mostly of other ancestry, the regional models are calibrated for fully-regional profiles and the fit will be poor; our Advanced Ancestry Report is a better choice.

1. Choose your community

Pick the community your family belongs to. Not sure? Choose "Let the model decide" and we compare you to every community automatically.

English (Kent)

England, an Anglo-Saxon and Jutish migration-era layer over a native British Iron Age and Roman-provincial base, Kent being one of the earliest and strongest Germanic settlement zones

Dutch

the Netherlands, a Germanic North Sea coastal population with a Frankish and Frisian layered history

Frisian

Friesland, one of the most genetically and linguistically distinct North Sea Germanic populations, the closest living relatives of Anglo-Saxon England

Flemish

Flanders, the Dutch-speaking, Frankish-founded region of Belgium

Danish

Denmark, the Viking Age heartland whose raiders and settlers reshaped England, Normandy and beyond

Norwegian

Norway, a Viking Age seafaring population that settled the Scottish isles, Ireland, Iceland and beyond

Swedish

Sweden, a Viking Age population with strong Baltic and eastern trade-route connections

North German

northern Germany, the Jastorf-culture Germanic Iron Age homeland and later Hanseatic trading world

🔎 Let the model decide (auto)

We detect which community you are genetically closest to.

What your report models

⚔️ Ancient regional core

The deep root shared by North Sea populations: native British, Dutch and Danish Iron Age, Roman Britain (with wider Roman Imperial contact), and British/Dutch Bronze Age.

🛡️ Medieval ancestry

The formation era of the North Sea world itself: the Anglo-Saxon migration, the Anglian tribal layer, the Viking Age (England, Denmark, Norway), Frisian Saxon settlers, and the Anglo-Norman layer that followed 1066.

🌍 Non-regional outside admixture

Even for people fully from the region, we include Ashkenazi Jewish, European, East Asian and West African proxies, so any real outside ancestry is detected honestly instead of being force-fit onto the wrong regional population.

⚓ Community profile

Which of the 8 North Sea communities your DNA most closely resembles, modelled directly against each community's modern reference population.

🧬 Y-DNA & mtDNA lineages

If your raw DNA file is available, we classify your paternal and maternal haplogroups in a North Sea Germanic context (e.g. I1 Scandinavian, R1b Northwest-European, R1a East-Germanic/Viking-Age).

57 reference populations

Your DNA is modelled against ancient North Sea proxies, modern community reference populations, and non-regional outside proxies.

Amerindian proxy

Amerindian (North) proxy · Amerindian (South) proxy

Ancient North Sea world

British Bronze Age · British Iron Age (native) · Danish Iron Age · Dutch Bell Beaker (Bronze Age precursor) · Dutch Bronze Age · Dutch Iron Age · Gaulish, Belgic Gaul (Iron Age, non-regional proxy)

Bronze Age sources

Han Bronze Age proxy (East Asian) · North German Bronze Age (Tollense) · Swedish Bronze Age · Yoruba Bronze Age proxy (West African)

Classical/Roman sources

Han Classical proxy (East Asian) · Imperial Roman Italian (Classical) · Roman Britain (Classical) · Scandinavian Iron Age (Roman period, non-Romanized) · Yoruba Classical proxy (West African)

Deep ancestral sources

Anatolian Neolithic farmer · Caucasus Hunter-Gatherer (CHG) · Eastern Hunter-Gatherer (EHG) · Han (East Asian proxy) · Iranian Neolithic farmer · Steppe (Yamnaya) · Western Hunter-Gatherer (WHG) · Yoruba (West African proxy)

European host

Celtic (Ancient Gaul) · Germanic · NE European · NW European · S European · SE European · SW European · West European

Iron Age sources

Han Iron Age proxy (East Asian) · Norwegian Iron Age · Swedish Iron Age · Yoruba Iron Age proxy (West African)

Medieval sources

Anglian (Medieval) · Anglo-Norman (Medieval) · Anglo-Saxon, Migration Period (Medieval) · Ashkenazi Jewish Medieval proxy · Danish Viking Age (Medieval) · Frisian Saxon (Medieval) · Han Medieval proxy (East Asian) · Norwegian Viking Age (Medieval) · Swedish Viking Age (Medieval) · Viking, England (Medieval) · Yoruba Medieval proxy (West African)

Modern North Sea communities

Danish · Dutch · English (Kent) · Flemish · Frisian · North German · Norwegian · Swedish

Being honest about the method

🔬 How to read your results (please read)

Your result is computed by genetic similarity (Global25): we place your DNA in a 25-dimension genetic space and find the mixture that best reproduces your profile. Every reference population in our panel uses real, official G25 coordinates (published academic ancient-DNA studies and the official Global25 dataset), none of our reference data is simulated or synthetic.

This is not a national or political determination of identity, and it is not a proof of belonging to any specific community. Fine distinctions between neighbouring communities can overlap in G25 and are best-fit estimates.

Why group these 8 communities in one report? They share the same North Sea formation story: the Anglo-Saxon and Frisian migrations, the Viking Age that reshaped England, the Low Countries and Scandinavia together, and centuries of cross-Channel and cross-sea contact that bound England, the Netherlands, Flanders and Scandinavia into one genetic world.

⚠️ Designed for predominantly North Sea Germanic ancestry. If you are mostly of other ancestry, the models are calibrated for fully-regional profiles and the fit will be poor.

Get your Nordsee report

Select your community above, then confirm your email. We send you a secure link to upload your DNA (raw file or G25 coordinates) and generate your personalised report.

Your name (on the report)

Email (for the paid PDF)

Report language

Discount code (optional)

I accept to receive emails from Explore Your DNA (optional)

Secure checkout after email verification. Your DNA is processed automatically and deleted; no human sees it.

📖 What is raw DNA & G25?

Frequently asked questions

Who is the Nordsee report for?

It is built for people of predominantly North Sea Germanic ancestry across any of 8 communities: English (Kent), Dutch, Frisian, Flemish, Danish, Norwegian, Swedish, and North German. If you are mostly of other ancestry, our Advanced Ancestry Report works better.

Why group England, the Low Countries and Scandinavia in one report?

They share the same formation story: the Anglo-Saxon and Frisian migrations out of the continental North Sea coast into Britain, the Viking Age that bound England, Denmark and Norway together through raiding and settlement, and centuries of cross-Channel trade and intermarriage between England, the Netherlands and Flanders.

Do I need to have taken a DNA test already?

Yes. Upload your raw DNA file from 23andMe, AncestryDNA, MyHeritage, FamilyTreeDNA or LivingDNA, or paste your G25 coordinates.

What is the "ancient regional core" in the report?

We model your DNA against native British, Dutch and Danish Iron Age populations, Roman Britain, British and Dutch Bronze Age, the Anglo-Saxon migration, the Anglian tribal layer, the Viking Age, Frisian Saxon settlers and the Anglo-Norman layer, the archaeological proxies closest to the ancient peoples of the North Sea world.

How much does it cost and what do I get?

€15. A full PDF report with your ancient regional core %, non-regional outside admixture breakdown, period-by-period breakdowns, closest modern community reference populations, Y-DNA and mtDNA haplogroups (if raw file provided), and a narrative interpreted by Claude AI.

A DNA report for the North Sea Germanic world

Nordsee is a G25 ancestry report built specifically for the peoples of the North Sea world. Upload your raw DNA file from 23andMe, AncestryDNA, MyHeritage or FamilyTreeDNA, pick your community, and we model your genome against the ancient regional core plus non-regional outside admixture.

Whether you are English with deep Anglo-Saxon and Viking layers, Dutch with a Frankish and Frisian layered history, Frisian (the closest living relatives of Anglo-Saxon England), Flemish from Frankish-founded Flanders, Danish or Norwegian from the Viking Age heartland, Swedish with strong Baltic trade-route connections, or North German from the Jastorf-culture Germanic Iron Age homeland: Nordsee models the specific genetic layers of your region's history.

The report uses the Global25 (G25) system developed by geneticist Davidski, placing your DNA in a 25-dimension genetic space alongside ancient and modern reference populations, all sourced from Davidski's official Global25 datasheets.

👁 Sample reports

See two real Nordsee reports

Two full example reports, flip through every page: cover, ancient regional core, period breakdowns, closest communities, and the AI narrative.

PDF

🇳🇱 Willem · Dutch

99% regional core, a Danish Viking Age medieval layer (71%), and a perfect (0.0000 distance) Dutch community match.

PDF

🇬🇧 Emily · English

A Roman Britain Classical layer (81%) and a Danish Viking Age medieval layer (53%), landing closest to the Dutch community, a real example of the tight southern North Sea genetic continuum.