The surname O'Coy was first found in County Cork (Irish: Corcaigh) the ancient Kingdom of Deis Muin (Desmond), located on the southwest coast of Ireland in the province of Munster, where they trace their origins through Amhailgadh, brother of Flaitheartach on the Maguire pedigree. He was in turn ancestor of MacAodh. 1
This line was native Irish, not to be confused with the group who descend from Mary MacCoy, wife of Duncan Campbell, of Inverary, Scotland who settled in Ulster, part of the Plantation of Ireland. They held lands in Londonderry.
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Early History of the O'Coy family
This web page shows only a small excerpt of our O'Coy research. Another 69 words (5 lines of text) covering the years 1715, 1774, 1832, 1839, 1872 and 1899 are included under the topic Early O'Coy History in all our PDF Extended History products and printed products wherever possible.
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O'Coy Spelling Variations
Spelling variations of this family name include: MacCoy, MacCooey and others.
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Early Notables of the O'Coy family
Another 38 words (3 lines of text) are included under the topic Early O'Coy Notables in all our PDF Extended History products and printed products wherever possible.
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O'Coy migration to the United States
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Some of the first settlers of this family name were:
O'Coy Settlers in United States in the 20th Century
Eliza Maud O'Coy, aged 39, who immigrated to America from Plymouth, England, in 1914
O'Coy migration to the United States 
France
Ireland
Scotland
