Selwyn m
English: transferred use of the surname, which is of disputed origin. There was a given name Selewyn in use in the Middle Ages, which probably represents a survival of an unrecorded Old English name composed of the elements sēle prosperity or sele hall + wine friend. Alternatively, the surname may be Norman, derived from Seluein, an Old French form of Latin Silvānus (from silva wood; cf. SILAS (SEE Silas)).
Variant: Selwin.
First names dictionary. 2012.