Gillan \gi(l)-lan\ as a girl's name (also used as boy's name Gillan), is a variant of Ghislaine (French) and Gillian (Latin), and the meaning of Gillan is "youthful".

The baby name Gillan sounds like Gilian and Jillan. Other similar baby names are Dillan, Aillin, Callan, Kallan, Dillian, Dyllan, Dillon, Eilean, Ellan, Fallan, Gilana, Gilah, Gila, Geelan, Gilda, Gilia, Giliah, Gilly, Gillie, Gill, Jillyan, Jillian, Giliana, Ghillian, Ghilian, Giula, Jillane, Jillana, Jilian, Kellan, Lillian, Lilian and Nollan.