O'Dea (/oʊˈdiː/ oh-DEE; Irish: Ó Deághaidh, formerly Ua Deághaidh), is an Irish surname derived from Deághaidh, the name of a tenth-century clan chieftain.[1]

O'Dea clan origins

The O'Dea clan, also found as O'Day or just Day, came originally from County Clare in Ireland where there is a fortified tower house over 500 years old known as O'Dea Castle[2] at the 80-acre (320,000 m2) townland of Dysert O'Dea (Irish: Dísert, meaning 'hermitage').[3] The ruins of the Dysert O'Dea Monastery, round tower, and St. Tola's high cross are 265 metres to the south-southwest of the castle in the adjacent 260-acre (1.1 km2) townland of Mollaneen (Irish: Molainín, meaning 'the little hill'),[4] near Corofin.[5] (52°54′41″N 9°03′59″W / 52.911361°N 9.066381°W / 52.911361; -9.066381)

Edward MacLysaght, the former Chief Herald of Ireland, writing in his book, Irish Families, began his discussion of the O'Dea family as follows:

O'Dea is a name associated alike in the past and at present almost exclusively with the County Clare and the areas such as Limerick City and North Tipperary which immediately adjoin it. It is not a common name anywhere and even in County Clare is not numerous outside the part of the county where it originated. This is indicated by the place names Tully O'Dea and Dysart O'Dea, the site of a famous battle in 1318. The head of the sept was chief of a considerable territory comprising much of the barony of Inchiquin. In Irish the name is Ó Deághaidh.[6]

In another book, The Surnames of Ireland, MacLysaght describes the O'Deas as "one of the principal Dalcassian septs", and about the name itself, he remarks, "The prefix O is now almost always used, but a century ago Dea was quite usual and the surname Day was regarded as synonymous."[7]

Ancestry

The O'Deas – together with the O'Quinns (Irish: Ó Cuinn) and the O'Griffins (Irish: Ó Gríofa) – belonged to the Uí Fearmaic group, which was a branch of the Dalcassian tribe.[8]

Notable O'Deas

See also

References

  1. ↑ Cathréim Cellacháin Caisil, Alexander Bugge, page 88, https://archive.org/details/caithreimcellach00norsuoft/page/88/mode/2up
  2. ↑ Dysart O'Dea Castle, Co. Clare by Risteard Ua Croinin and Martin Breen, The Other Clare, Volume 9, page 17. Shannon Archaeological and Historical Society, April 1985.
  3. ↑ Dysert townland at the Irish Placenames Database, logainm.ie. Retrieved 3 August 2010.
  4. ↑ Mollaneen townland at the Irish Placenames Database, logainm.ie. Retrieved 3 August 2010.
  5. ↑ Map of Dysert and Mollaneen at Ordnance Survey Ireland Archived 29 August 2012 at the Wayback Machine. Select Historic 6" option to see old townland boundaries. maps.osi.ie. Retrieved 3 August 2010.
  6. ↑ Irish Families: Their Names, Arms and Origins, by Edward MacLysaght. Dublin: Hodges Figgis 1957, rev. 1972, page 112.
  7. ↑ Surnames of Ireland, by Edward MacLysaght. Shannon: Irish UP 1969.
  8. ↑ O'Laughlin, Michael C. Families of County Clare Ireland. Irish Genealogical Foundation. ISBN 978-0940134980.

Further reading

  • O'Dea: Ua Deághaidh: The Story of a Rebel Clan, by Risteárd Ua Cróinín (Richard Cronin), Ballinakella Press, Whitegate, Co. Clare, Ireland, 1992. ISBN 0-946538-07-7.
  • Irish Battles – A Military History of Ireland, by G.A. Hayes-McCoy, Appletree Press, 1990, ISBN 0-86281-250-X
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