Start My Family Tree Welcome to Geni, home of the world's largest family tree.
Join Geni to explore your genealogy and family history in the World's Largest Family Tree.

Project Tags

view all 26


  • Roderick Brown (c.1882 - 1942)
  • Samuel Whidden (c.1643 - bef.1714)
    The first known ancestor of this Whitten Family in America was Samuel Whidden, a bricklayer and mason of Portsmouth and Greenland, NH. He was first known of in Portsmouth as early as June 24, 1662. In ...
  • Petter Pittersen Don Dass (Dundas) (1605 - 1654)
    Peter Pittersen Don Dass Also known as "Peiter Dundas". Navnet kommer fra Skottland og lød "Dundas" i sin tidligere form. DùnDeas er gælisk (keltisk), der "dun" betyr ås, bakke, og "deas" betyr sør...
  • Rhys ap Rhydderch (c.1200 - d.)
    yDNA R1b1a2a1a1b4 (2013) For information about his DNA, see:
  • Sylfest Eiriksson Hørven (1699 - 1775)
    Bygdebok for Lom Band 3 side 489, Sygard Marstein: Ca 1703-ca 1746: Syver Erlandsson 1679, d.1755. Gift 1703 med Kari Halvorsdotter. Dei tok truleg over da dei gifta seg, og var i alle fall brukar...

This project is for people who have tested and been assigned the paternal haplogroup R1b1a2a1a2c (L21) and also for people who are believed to have been this paternal haplogroup based on tests done on descendants.


  • R1b1b2a1a2f (ISOGG 2009, 2010)
  • R1b1a2a1a1b4 (ISOGG 2011)
  • R1b1a2a1a1b3 (ISOGG 2012)

Defining Mutations

  • L21/M529


(to be added)


Myres et al. report this group is most common in England and Ireland (25-50% of the whole male population).

Subclades of R

Famous Members

1) According to the Stewart Stuart DNA Project House of Stuart, who ruled Scotland from 1371, then also England and Ireland from 1603 until 1707, belongs to the S781 branch of R1b-L21, downstream of DF13 and L744.

2) The Buchanan DNA Project confirmed that the 15th President of the United States, James Buchanan (1791-1868) was a descendant of the Scottish Clan Buchanan, and as such belonged to the CTS11722 subclade of R1b-L21, downstream of L1335.

3) William Ewart Gladstone (1809-1898), a British Liberal politician who served a record four times as Prime Minister under Queen Victoria, belonged to R1b-L21 based on a comparison of his genealogy with the results from Gladstone DNA Project.

4) The analysis of his descendants's Y-chromosomal DNA confirmed that Joseph Smith (1805-1844), the founder of Mormonism and the Latter Day Saint movement, belonged to haplogroup R1b-M222.

5) The forensic analysis of the skeletal remains of Che Guevara (1928-1967), the Argentine Marxist revolutionary and major figure of the Cuban Revolution, revealed that he belonged to haplogroup R1b-L21.

How to Participate

Geni Wiki Projects Page

To participate in this project, join or follow the project, then 'add your oldest known ancestor who belonged to this haplogroup. The profile must be set to public in order to add it.