O'Cawley is a surname in the English language. According to John O'Hart, a 19th-century Irish genealogist, the surname is an Anglicised form of the Irish Ó Cadhla.. The Irish Ó Cadhla originated as a patronym, meaning "descendant of Cadhla". The masculine personal name Cadhla means "beautiful", "comely", "graceful"., this web page is a transcription of: . In the United States of America the surname is extremely uncommon, and did not rank in the 2000 United States census..
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