Definition of "Duffy"

A surname from Irish, an anglicization of Ó Dubhthaigh (“descendant of Dubhthach”). Dubhthach is a byname derived from dubh (“black”).  examples

A surname from Irish, an anglicization of Ó Doithe.  examples

A Scottish surname from Scottish Gaelic [in turn originating as a patronymic], an alternate anglicization of Mac Dhuibhshíthe (McPhee).  examples

A suburb of Canberra, Australia; named for Charles Gavan Duffy, 8th Premier of Victoria.  examples

An unincorporated community in West Virginia, United States.  examples