Family name origins & meanings
- English : habitational name from Cosgrove in Northamptonshire, named with an Old English personal name Cōf + Old English grāf ‘grove’, ‘thicket’.
- Irish : surname adopted from English by bearers of the Gaelic name Ó Coscraigh ‘descendant of Coscrach’, a byname meaning ‘victorious’, ‘triumphant’ (from coscur ‘victory’, ‘triumph’).