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Haplogroup T is a human mitochondrial DNA (mtDNA) haplogroup.

Haplogroup T is believed to have originated in Mesopotamia or Anatolia approximately 10,000 years before present, and to have moved northwards. It is found with particularly high concentrations around the eastern Baltic Sea, and the Urals.

Haplogroup T derives from the haplogroup JT, which also gave rise to Haplogroup J.

Spread of haplogroup JT Image source

People of haplogroup T

The last Russian tsar, Nicholas II, has also been shown to be of haplogroup T. This was established when genetic testing was done on his remains to authenticate his identity. As a consequence, all his matrilineal relatives have haplotype T. Assuming all relevant pedigrees are correct, this includes all female-line descendants of his female line ancestor Barbara of Celje (1390-1451), wife of Sigismund, Holy Roman Emperor. This includes thousands of European nobles, including the Electress Sophia of Hanover, Charles I of England, George I of Great Britain, Frederick William I of Prussia, Charles X of Sweden, Gustavus Adolphus of Sweden, Maurice of Nassau, Prince of Orange, Olav V of Norway, George I of Greece and George V of England [1].

The American outlaw Jesse James was found to have been of the subgroup T2.

In his popular book The Seven Daughters of Eve, Bryan Sykes (who is himself in haplogroup T) named the originator of this mtDNA haplogroup Tara.


Spread of Haplogroup T, from National Geographic