Save Type Surname (from given name) Usage Irish Pronounced Pron. /ˈkɜː.wən/(British English) /ˈkɜːɹ.wən/(American English) [key·simplify] Other Forms FormsKerwin Meaning & History From Gaelic Ó Ciardhubháin meaning "descendant of Ciardhubhán", a given name composed of the elements ciar "dark" and dubh "black" combined with a diminutive suffix.