I have tried to find more info about 'L226' and the only place I could find it mentioned is in two Irish American family history thread blogs/projects.
Here is my web site on the R-L226 haplogroup (the three links in the haplogroup pull down menu are updated weekly but the other content is not updated very often):
http://www.rcasey.net/DNA/R_L226/R_L226_Private.htmlAnother good web site is maintained by the lead admin for the R-L226 project - our YSTR signature was the third signature (YSTR pattern) that is believed to be 90 % Irish in origin and between 1,500 to 2,500 years old (the older date includes L226 equivalent branches). This is why this web site states Irish Type III:
http://www.irishtype3dna.org/index.phpI am only aware of three haplogroups that are very Irish in origin: R-M222 (largest - 3X larger than L226), R-L226 (second largest) and CTS4466 (third largest - pretty close to L226). This represents only five percent of Irish testers, so haplogroups can only identify five percent of the Irish testers, the rest are pretty mixed. M222 and L226 are connected to the first two kings to unite/conquer the entire island of Ireland and enjoy the spoils of war to become prolific.
A lot of English surnames are now used by Irish people today.
I see many American family history researchers who say this.
This is based only on R-L226 genetic testers only and the known family history associated with these testers. To date, for 90 % of the testers who predicted or verified to be R-L226, they list Ireland as their place of residence for any European countries. In fact, R-L226, has 80 % of the testers who show a county level residence are from only five counties in southern Ireland: Clare, Tipperary, Cork, Kerry and Limerick. Since R-L226 was proven to include King Brian Boru and his ancestry, the original origin is probably limited to County Clare. One of our testers is Sir Conor O'Brien, the official title holder of the O'Brien surname - title that has been passed to only to male O'Brien descendants over the last 1,000 years (it goes through a formal approval process every generation for around 40 generations). The rise in prolific offspring of R-L226 tracks very closely with the rise to power of Dal gCais tribe, the ancestors of King Brian Boru.
One of my grandchildren has 'Casey' ancestry, this is why I am trying to understand it all btw.
Here is my web site on the Casey DNA project:
http://www.rcasey.net/DNA/Casey/CaseyDNAProject.htmlIf you grandchild can prove her Casey line back to 1870 (with ties to the five counties mentioned for R-L226) and can locate a living Casey descendant of this line, I will send this living male descendant a FTDNA 37 marker test kit at no charge ($169 value). I descend from one of the earliest larger migration of Irish to America in the 1740s during the large crop failures driven by significant climate change for several years. They were residing in western South Carolina in the early 1750s and by 1800, there were around 50 adult Casey males living in three counties of South Carolina.
Three of our Casey genetic lines are R-L226 and represent around one-third of all Casey's in the world today. We also have a few Casey's that were R-M222 as well. The rest have a very varied haplogroups and around 20 % have not tested enough YSNPs to know which haplogroup they belong to. This based on the 75 Casey testers to date which is very biased with American testers with very few Irish testers. However, the number of people of Irish descent are spread through out the British colonies:
Casey tracks the averages: Ireland 1X, USA 8X, England 1.2X, Australia/NZ 1X and Canada 0.5X
Hogan tracks the averages: Ireland 1X, USA 7.6X, Australia/NZ 1.3X, England 1X and Canada 1X
McNamara tracks close: Ireland 1X, USA 5.6X, Australia/NZ 1.8X, England 1.2X and Canada 0.6X
http://forebears.io/surnames/hogan