Cornyn is a surname in English-language countries; it is from Ireland originally, and is the equivalent of Curneen. According to historian C. Thomas Cairney, the O'Cornyns were part of the Conmaicne Rein tribe in Ireland who came from the Erainn tribe, the second wave of Celts to settle in Ireland from about 500 and 100 BC.

Notable people sharing the surname Cornyn

See also