O'Dea History, Family Crest & Coats of Arms
- Origins Available:
All Irish surnames have a unique and often romantic meaning. The name O'Dea originally appeared in Gaelic as O Deaghaidh or O Diaghaidh.
Early Origins of the O'Dea family
The surname O'Dea was first found in County Clare (Irish: An Clár) located on the west coast of Ireland in the province of Munster, where O'Dea was chief of Dysart-O'Dea, now the parish of Dysart, barony of Inchiquin, one of the original chiefs and clans of ancient Thomond. Today Dysert O'Dea Castle still stands near Corofin, County Clare with its Romanesque Doorway and High Cross and was the site of the Battle of Dysert O'Dea in 1318. It was here that the Irish chieftain Conor O'Dea, chief of the Cineal Fearmaic and ally of Murtough O'Brien, stood his ground only to be defeated by the invading forces from Scotland.
Early History of the O'Dea family
This web page shows only a small excerpt of our O'Dea research. Another 137 words (10 lines of text) covering the years 1318 and 1434 are included under the topic Early O'Dea History in all our PDF Extended History products and printed products wherever possible.
O'Dea Spelling Variations
The spelling of names in Ireland during the Middle Ages was rarely consistent. This inconsistency was due to the scribes and church officials' attempts to record orally defined names in writing. The common practice of recording names as they sounded resulted in spelling variations such as Day, Dea, O'Dea and others.
Early Notables of the O'Dea family (pre 1700)
Notable among the family name at this time was Most Rev. Thomas O'Dea; and Cornelius O'Dea (d. 1434), Archdeacon of Killaloe and later Bishop of Limerick. Three items of his have survived over the centuries: his Mitre, Crozier and a manuscript now entitled "The Black Book of Limerick." Today, they are all kept in Limerick's Hunt Museum. "According to a legend Bishop Cornelius O'Dea went to Dublin to attend a synod of bishops without his...
Another 74 words (5 lines of text) are included under the topic Early O'Dea Notables in all our PDF Extended History products and printed products wherever possible.
In the United States, the name O'Dea is the 11,989th most popular surname with an estimated 2,487 people with that name. 
| O'Dea migration to Australia ||+|
Emigration to Australia
followed the First Fleets
of convicts, tradespeople and early settlers. Early immigrants include:
O'Dea Settlers in Australia in the 19th Century
- Mr. James O'Dea, British convict who was convicted in Guernsey for 7 years, transported aboard the "Aurora" on 3rd November 1833, arriving in New South Wales, Australia 
- Daniel O'Dea, aged 26, a labourer, who arrived in South Australia in 1849 aboard the ship "Cheapside" 
- John O'Dea, aged 37, a labourer, who arrived in South Australia in 1849 aboard the ship "Constance" 
- Mary O'Dea, aged 38, a dairy maid, who arrived in South Australia in 1849 aboard the ship "Duke of Wellington" 
- John O'Dea, aged 14, who arrived in South Australia in 1849 aboard the ship "Duke of Wellington" 
- ... (More are available in all our PDF Extended History products and printed products wherever possible.)
| O'Dea migration to New Zealand ||+|
Emigration to New Zealand followed in the footsteps of the European explorers, such as Captain Cook (1769-70): first came sealers, whalers, missionaries, and traders. By 1838, the British New Zealand Company had begun buying land from the Maori tribes, and selling it to settlers, and, after the Treaty of Waitangi in 1840, many British families set out on the arduous six month journey from Britain to Aotearoa to start a new life. Early immigrants include:
O'Dea Settlers in New Zealand in the 19th Century
- Edmond O'Dea, aged 18, a farm labourer, who arrived in Auckland, New Zealand aboard the ship "Salisbury" in 1876
|Contemporary Notables of the name O'Dea (post 1700) ||+|
- John O'Dea (1839-1905), Union Army soldier during the American Civil War who received the Medal of Honor for gallantry during the Siege of Vicksburg on May 22, 1863
- Edward John O'Dea (1856-1932), American prelate of the Roman Catholic Church, Bishop of Seattle (1896-1932)
- Kevin O'Dea (b. 1960), American NFL football coach for the Tampa Bay Buccaneers
- Paul O'Dea (1920-1978), American Major League Baseball player, manager and scout
- Patrick John "Kangaroo Kicker" O'Dea (1872-1962), Australian rules and American football player and coach, inducted into the College Football Hall of Fame as a player in 1962
- James Kenneth "Ken" O'Dea (1913-1985), American Major League Baseball catcher who played from 1935 to 1946, one of the best defensive catchers in Major League Baseball
- Judith O'Dea (b. 1945), American actress, best known for her role as Barbra in the Night of the Living Dead (1968)
- Marcus O'Dea (1897-1961), American physicist
- Patrick John O'Dea (1872-1962), American college football coach at Missouri and Notre Dame
- Mick O'Dea (b. 1958), Irish portrait and landscape artist
- ... (Another 18 notables are available in all our PDF Extended History products and printed products wherever possible.)