Bragança Surname: Y-DNA Haplogroup
Published genetics research or a documented case study links the surname Bragança to a specific Y-DNA paternal-line haplogroup.
R-Z381 (R1b1b2a1a1b*)
Clade R1b
Also spelled: Braganza, Orléans-Bragança, Bourbon-Bragança
Important caveat: the tested "Prince of Orléans-Bragança" descendant is patrilineally a Bourbon-Orléans descendant (via Gaston, Comte d'Eu, who married into the Brazilian imperial family in 1864, with descendants adopting the Bragança name), NOT a patrilineal descendant of the original 1442 Portuguese House of Braganza founder, whose actual Y-haplogroup has never been tested/published. This R-Z381 result applies only to the Orléans-Bragança pretender branch, not to people surnamed Bragança/Braganza generally.
Source: Larmuseau MHD, Delorme P, Germain P, et al. "Genetic genealogy reveals true Y haplogroup of House of Bourbon contradicting recent identification of the presumed remains of two French Kings." European Journal of Human Genetics. 2014;22(5):681-687. doi:10.1038/ejhg.2013.211
How to read this. A surname match means some people with that surname, in a specific study or family record, were found to share a haplogroup, most likely due to a shared patrilineal ancestor generations back. It is not proof that you personally carry that haplogroup: surnames change through adoption, remarriage, non-paternity events, and independent origin of the same name in different families. For your own confirmed haplogroup, test your DNA with our HaploAI Y-DNA/mtDNA predictor.
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