Allyn \a-ll-yn\ as a boy's name (also used as girl's name Allyn), is a variant of Alan (Old German) and Allen (Gaelic), and the meaning of Allyn is "precious".

The baby name Allyn sounds like Alyn, Allon, Allin, Alleyn, Allan and Alwyn. Other similar baby names are Albyn, Alvyn and Arlyn.