Royal House of Thomond Y-DNA Descendants' Tree
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Royal House R - L226 – Irish Type 3 – The Dal gCais Clan The DNA Haplogroup known as R-L226 dates back to the earliest times of Celtic Ireland. Recent research has shown that R- of R-FGC5659 YFS231286 dates from around the 12th Century. However, because Brian Bóruma mac of the known connection between King Brian Boru and the current Thomond R-DC782 Cennétig - Prince of Thomond, Baron Inchiquin, we can now claim that any male with the YFS231286 haplogroup in their DNA make-up is Y-DNA Descendants’ R-Y5610 King Brian Boru certainly a descendant of the Royal House of Thomond. Tree Line cont’d for 15 generations till (941 – 1014) 1400’s. R-DC1 R-YFS231286 R-DC1344 R- FT120219 Morrissey family R-DC311 Co. Limerick King Torlough VI O’Brien Toirdhealbhach Donn mac Taidhg Ó Briain c. 1455 d. 1528 King Murrough Ó Briain R-BY5212 King Conor IV O’Brien c. 1485 d.1543 c. 1480 d. 1539 O’Dea families R-FGC13418 R-DC768 Co. Clare R-DC1542 (After 1500) R- DC344 L226 Pre 500AD FGC5659 Pre 900AD DC782 Bet 900 – 1050AD Line continues for 8 generations till 1773 1773 till generations 8 for continues Line This line splits within 2 Y5610 Bet 900 – 1200AD generations DC1 Bet 1000 – 1150AD Family Family Family O’Brien families YFS231286 Bet 1150 – 1300AD settled in stayed in settled in of Ennis, Clare L226 Pre 500AD USA Ireland Australia DC1344 Bet 1300 – 1400AD FT120219 Bet 1300 – 1400AD R-DC310 BY5212 Bet 1400– 1550AD FGC13418 Post 1500AD Split sometime of Smithtown, Co. Clare O’Brien DC1542 Bet 1400– 1550AD DC344 Post 1500AD L in the 1600’s Y44000 Pre 1750AD DC768 Post 1500AD ine continues for DC863 Pre 1750AD DC310 Pre 1770AD FT96594 Post 1800 DC307 & DC346 Post 1800 Family families settled in USA R-Y44000 10 R-DC863 generations till 1950’s O’Brien’s Sir Edward O’Brien of Rathwood Townland, O’Brien’s 1773 - 1837 Family Abington Parish, Co. settled in of Loughglynn Limerick Australia (C 1680) Co. Roscommon (C 1700’s) . O’Brien’s of Rath Townland, Sir Lucius O'Brien William Smith-O’Brien Abington Parish, Co. Line continues for 1800 - 1872 1803 - 1864 Family Family over 5 generations stayed in Limerick settled in (C 1680) USA Ireland R-FT96594 R-DC307 R-DC346 (After 1870) (After 1800) 3 generations 4 generations Brien Family settled in Australia Family Family Family Family settled in settled in stayed in settled in Australia USA Ireland Britain The O’Brien – Baron Inchiquin O’Brien Family Thomond House Co. Clare. Ire. settled in Australia. ©December 2019 - The O’Brien Surname Project .