Cas or Tál Cas was the eponymous ancestor and dynastic founder of the

Dál gCais The Dalcassians ( ga, Dál gCais ) are a Gaelic Irish clan, generally accepted by contemporary scholarship as being a branch of the Déisi Muman, that became very powerful in Ireland during the 10th century. Their genealogies claimed descent fr ...

(Deisi Tuaiscirt) from whom all the branches claim common descent.

Life

He was the son of Conall Eachluath and his wife Coirpthe, daughter of Eochaid Mugmedon. He acquired the nickname Tál (adze) as he was the foster son of a wright. He became King of Thomond and made a

gavel A gavel is a small ceremonial mallet commonly made of hardwood, typically fashioned with a handle. It can be used to call for attention or to punctuate rulings and proclamations and is a symbol of the authority and right to act officially in the ...

of his territory among his thirteen sons. On his death the kingship of Thomond passed to his eldest son Blait.

Tadhg Ó Donnchadha Tadhg Ó Donnchadha (1874 – 1949) was an Irish writer, poet, editor, translator and a prominent member of the Gaelic League (''Conradh na Gaeilge'') and the Gaelic Athletic Association. He was editor of ''Irisleabhar na Gaedhilge'' (The ...

,"An Leabhar Muimhneach", 1900, page 86, page 237, page 295, https://archive.org/details/leabharmuimhneac01odon/page/86/mode/2up, https://archive.org/details/leabharmuimhneac01odon/page/236/mode/2up, https://archive.org/details/leabharmuimhneac01odon/page/294/mode/2up

Family

He had thirteen sons, at least three of which would found substantial lineages whose descendants would rule as lords over substantial territories: * Blod (''Uí Bhloid'') **Carthann Fionn ***Oenghus (''Uí Óengussa'') ****''Uí Ronghaile'' ****''Uí Chearnaigh'' *** Eochaidh Bailldearg ****''Uí Floinn'' ****''Uí Thoirdhealbhach'' *****'' Ua Briain'' *****'' Ua Cinnéidigh'' *****'' Ua hEachthighearn'' * Caisín (''Ua Caisin'') **Eochaidh ***''Cinéal nDúnghaile'' ** Sineall ***''Uí Dhobharchon'' **Carthann ***''Clan Cuiléin'' **** Eoghan mac Cuiléin *****''Clan Cuiléin Uachtarach'' **** Maol Cluiche mac Cuiléin *****'' Mac Conmara'' *****'' Ua hAllmharain'' *****'' Ua hArtagain'' * Aonghus Ceann-nathrach ** ''Cinéal Fermaic'' ***'' Ua Deághaidh'' ** ''Cinéal gCuallachtaigh'' ***'' Ó Gríobhtha'' ** ''Cinéal mBaoi'' * Aonghus Ceann-aitinn ** ''Clann Ifeamain'' ** ''Clann Neachtain'' * Lughaidh/Dealbhaoth ** ''na Dealbhna'' ** ''Muinnter Chochláin'' * Carthann ** ''Dal gCais Leithe Lachtmhuighe'' * Aedh ** ''Ui Aedha'' * Lughaidh Éile ** ''Muinnter Dhobharchon'' ** ''Muinnter Chonraoi'' ** ''Muinnter Chearnaigh'' ** ''Muinnter Aonghusa'' ** ''Muinnter Dhubhthaigh'' * Séadna * Cormac * Caindeach * Nae * Loisceann

DNA

Surnames purported to be of Dalcassian origin have a statistically significant correlation with the possession of the Y-DNA signature R-L226 and thus this mutation is believed to be associated with their ancestral founder.

References

{{reflist Dál gCais