Derwyn \d(e)-rw-yn\ as a boy's name is a variant of Derwin (Old English) and Durwin (Old English), and the meaning of Derwyn is "gifted friend, dear friend". The baby name Derwyn sounds like Derwynn, Darwyn and Durwyn. Other similar baby names are Berwyn, Delwyn, Kerwyn and Merwyn. View a list of the 2 names that reference Derwyn.