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This project is a meeting place for users who share the R1b1a2a1a1b4f Y-DNA haplogroup, which means they are related along their paternal lines. Users in this group may want to share their family trees with each other to find overlaps and merge duplicate profiles in order to join or expand the World Family Tree and discover new relatives.
This is an example of the old ISOGG notation, which has been abandoned by most, because it is unstable - it changes whenever new subclades are discovered somewhere in the chain.
- According to the ISOGG 2016 haplotree, this notation stops making sense at R1b1a2a (M18).
- According to the ISOGG 2014 haplotree, this notation stops making sense at R1b1a2a1a1b (Z19, S493/YSC0000053/Z18), there is no b4 - the same is true for ISOGG 2013 and 2015.
- According to the ISOGG 2012 haplotree, this notation stops making sense at R1b1a2a1a1b4 (L238/S182) - there is no f.
- According to the ISOGG 2011 haplotree, this notation means L159.2/S169.2.
The 2012 group is named R1b1a1a2a1a2c1d1a in the 2016 tree.
The mutation sequence above L159.2 is
P312/PF657/S116 > L21/M529/S145 > CTS241/DF13/S521 > ZZ10(?) > L159.2/S69.2