Corcoran
An Irish surname, traditionally linked to a Gaelic name associated with the name Cork or with a personal ancestor named Cormac-like in form, though early explanations vary.
The #2,044 most common surname in the United States (2010 Census) — about 1 in every 17,535 Americans shares it.
Etymology
Corcoran is an Anglicized Irish surname. The historical sources supplied do not agree on a single certain derivation: some connect it with an Irish Gaelic form beginning O/Cor- and others group it with related Corken/Corkeran spellings, suggesting a Gaelic family-name base that was reshaped in English records. Because the OCR excerpts are noisy and the older authorities differ, the safest summary is that it is an Irish surname from a Gaelic personal or clan name, with the exact root remaining uncertain in these excerpts.
History
The name is recorded in Irish surname materials in several spellings, including Corcoran, Corkeran, Corkran, and Corken. The excerpts also place the name especially in Irish county contexts, and later English-language records show the anglicized form becoming established. In modern usage it is a well-known Irish surname in Ireland and the diaspora, especially in English-speaking countries.
Origin
Regions
Variant spellings
Fun fact
The same 19th- and early-20th-century reference tradition often lists Corcoran alongside several close variants, showing how fluid Irish surname spellings could be in English records.
From the historical record
“Corcoran. From the Irish cor- curach (purple). See Cochrane Cordingley. From Cottingley; a JC( loc. n., Yorks”
— British Family Names: their origin and meaning (2nd ed.)