When O'Brien was born in 1917, in United States, her father, Clarence Leroy O'Brien, was 26 and her mother, Marzetta Taylor, was 19. She died about 1917, at the age of 1.
Some characteristic forenames: Irish Brendan, Dermot, Liam, Brigid, Declan, Donovan, John Patrick, Kieran, Colm, Donal, Brennan, Caitlin.
Irish: Anglicized form of Gaelic Ó Briain ‘descendant of Brian’, a personal name probably based on the element bre- ‘hill’, with the transferred sense ‘eminence’, i.e. ‘exalted one’. See also Bryan . In Ireland there has also been some confusion with O'Byrne (see Byrne ).
History: This name is borne in particular by one of the greatest of Irish septs, descendants of Brian Boru, who rose to the high kingship of Ireland in 1002.