Quick answer
Finnegan is a boy name.
Meaning and history
From an Irish surname, an Anglicized form of Ó Fionnagáin, itself derived from the given name Fionnagán, a diminutive of Fionn. This is the surname of a relatively minor character in James Joyce's novel Finnegans Wake (1939), the title of which was based on a 19th-century Irish ballad called Finnegan's Wake.
Notes and context
Usage: english