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Irish Eponym Names

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Surname/tag: IRISH_ROOTS
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Irish Eponym Names Irish Kingdoms High Kings of Ireland Irish Clan List Category Category: Name studies
Ulaid (Érainn?) Laigin Eóganachta Connachta Dál gCais

myFTDNA Groups -

Under Construction. This was the first attempt to track Haplogroups assigned to Historic profiles. Due to the large number of these Haplogroups a new approch is needed and this page is for referance only. If you have any questions, leave a note below or PM Devlin-670 19:24, 31 August 2022 (UTC)

Welcome to the Irish Eponym Names Page

?? Part of the Ireland Project Medieval Project - Ireland, and Project:DNA

With the advent of the Big Y-700 test, FamilyTreeDNA group project leaders are finding likely DNA markers for historical people. This Project Page lists the ones found. If any one finds new markers, you can add it to the list or leave a note at the bottom of this page and it will be added. This is still in the proposal level, so let me know if you have any ideas or questions.

FTDNA admin Utilities ISOGG Y-DNA Tools


Marker Est. Yr. Progenitor Clan Page Clan Category
0025? Feradach Finnfechtnach Fearadhach (-abt.0036) (Connachta)
0025? Fíatach Finn mac Dáire (abt.0005-abt.0039) (Ulaid)
Dál Fiatach
0100? Fiacha Suidhe max Felim (0105-) (Dál gCais)
Déisi Muman
DF104[1][2] 0120[2] Conn of the Hundred Battles (-0157) (Connachta)
Dál Cuinn
Kingdom of Connacht
Z3008[3] 0400[4] Eochu (Eochu) Cairpre (abt.0260-) The Three Collas
A18726[5] 0400? Brión (Macechach) mac Echach Muigmedóin (-abt.0425) Uí Briúin
FGC23742 BY35727[5] 0500[6] Fiachrae mac Eochaid Mugmedón (abt.0340-) Uí Fiachrach
ZZ87[5] 0400? Niall of the Nine Hostages (c.0360 - 0452) Uí Néill O'Neill O'Neill_Dynasty
0300? Ailill mac Echach Mugmedóin (0340-) Uí nAilello
0400? Conall Gulban mac Niall (abt.0400-abt.0464) Cenél Conaill
S588[7] 0500[8] Eógan mac Néill (abt.0400-0465) Cenél nEógain Category:Cenél_nEógain
0400? Lóegaire mac Néill (-abt.0462) Cenél Lóegairi
0500? Coirpre mac Néill (-aft.0501) Cenél Coirpre (southern Uí Néill)
0400? Maine Mac Niall Eochaid (-0440), Máine Mór mac Eochaidh (abt.0360-abt.0407) Cenél Maine (of Tethba)
0500? Fiachu mac Néill (-aft.0514) Cenél Fiachrah
0500? Colman Már mac Diarmata (-abt.0555) Clann Cholmáín
0500? Forgg mac Dalláin (-abt.0500) (Ulaid) Dál Fiatach
0500? Feradach mac Muirdach (-abt.0530) Cenél Feradaig
BY3292[7] 1250? Aodh Buidhe O'Neill (-1283) Clandeboye O'Neill
BY3342[7] 0790? Cenel Moain
Z1513[9] 1319[10] Aodh an Macaoimh Tóinleasg O'Neill (-1177) Royal O’Neills
FT32273[7] 1400? Aodh O'Neill (aft.1425-1475) Tyrone/Fews
S595[7] 1050[11] O’Cathains (O’Kanes)
0170? Eoghan Mór macModhna (abt.0170-) Dal Cais Déisi Dál gCais (Dalcassians)
R-L226? 0350? Tál Cas mac Conall Echluath (0347-) Dal Cais
FGC5659[12] 0900[13] Brian Boru (abt.0940-1014) Dal Cais Déisi Dál gCais (Dalcassians)
BY18115+[5] 1100? Turlough ‎Mór O'Conor (abt.1088-1156) Tairdelbach Már Ó Conchobair
Marker Est. Yr. Progenitor Clan Page Clan Category
Z16282[14] Charles Carroll (1737-1832)
BY37245 >?[15] John O'Malley (1795-)

MacCarthy - failbhe Flann[16] and Carthach wikipedia -

Notes from David Robert Charles Mac Donagh: I found after working with the O’Conor Don's data is that there is one mutation per man (the same as YFull and Iain), 30 years per generation on average, and a new mutation every other generation or every 60 years on average. These are any kind of mutations, SNPs, INDELs, etc., but not STRs, and not just SNPs like YFull's and Iain's methods use. Here is my very rough table. The order in which mutations (Marker) occurred within a multiple mutation phylogenetic node is completely unknown, so those mutations are just used as placeholders and are not meant to be taken as representing the chronologically correct order. The Approximated Birth Year (Est. Yr.) is just a convenience that helps confirm the feasibility of my heuristic. Finally, the generation in which a mutation occurred is also just an approximation and could move one generation in either direction.


  • Rich Devlin - Working on Irish Clans
  • Gina Meyers - Not immediately sure I can help, but I love this idea. I'll keep a lookout.
  • Z Fanning - Working on The MacGillaPatricks, MacCarthy and O'Brien branches


  1. Dál Cuinn Group genetic genealogy project.
  2. 2.0 2.1 Family Tree DNA Dál Cuinn Group Project - David Robert Charles Mac Donagh
  3. Z3008 DNA of The Three Collas, By Four Colla Descendants: Peter Biggins, with Josiah McGuire, Patrick McMahon, and Tom Roderick
  4. Yfull R-Z3008
  5. 5.0 5.1 5.2 5.3 Family Tree DNA - sons-of-aodh Group Project - Grace (Granuaile Ní Fhlannagáin)
  6. Yfull FGC23742
  7. 7.0 7.1 7.2 7.3 7.4 Family Tree DNA - O'Neill Group Project - Dwayne ONeill
  8. Yfull R-S588
  9. YouTube The Cenél nEógain & “Royal O’Neills” by Dwayne O'Neill July 2021
  10. Yfull R-Z1513
  11. Haplogroup S595 -DNA links to the O'Cathains of Ulster: Using Lineages, Surnames and DNA as Supporting Evidence - Dwayne ONeill & Edward Kane 5.0
  12. FGC5659 Brian Boru DNA By Peter Biggins
  13. Yfull R-FGC5659
  14. Z16291 Ely Carroll DNA, By Peter Biggins
  15. ftDNA OMalley Group - Maurice Gleeson
  16. https://www.libraryireland.com/Pedigrees1/Heber.php


Devlin, (Irish Dobhailéin), Devlin_Name_Study - Notes: G2G to be entered
Devlin of Tyrone (to be entered, see Devlin name study)
Dobhailen mac Gormghus - Devlin of Sligo
Develin (see Devlin)
Maxwell - "Enter Eponym Here" - Maxwell Name Study - Notes:

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Great work on our Irish roots Rich! Thank you! Mags
posted by Mags Gaulden