Cullin \c(ul)-lin\ as a boy's name is a variant of Cullen (Irish, Gaelic), and the meaning of Cullin is "good-looking lad; handsome".

The baby name Cullin sounds like Collin and Cullan. Other similar baby names are Allin, Cailin, Callan, Callis, Calvin, Carlin, Catlin, Cillian, Colldin, Coldin, Colin, Collis, Collie, Collins, Collen, Colwin, Conlin, Cullinan, Culley, Cully, Dallin, Kellin, Mallin, Mellin, Rollin and Tallin.