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

The baby name Cullan sounds like Callan and Cullin. Other similar baby names are Allan, Caelan, Calan, Cillian, Colan, Colla, Collin, Collen, Colman, Conlan, Cullinan, Culley, Cully, Curran, Dallan, Dillan, Dyllan, Gillan, Julian, Kellan, Mellan, Nollan, Quillan, Rollan and Tallan.