Dillan \d(il)-lan\ as a boy's name (also used as girl's name Dillan), is a variant of Dillon (Irish, Gaelic) and Dylan (Welsh), and the meaning of Dillan is "like a lion; loyal; son of the sea".

The baby name Dillan sounds like Dallan, Dillen, Dilan and Dyllan. Other similar baby names are Gillan, Allan, Ailean, Callan, Cillian, Cullan, Dallin, Dallon, Dallen, Dalan, Dallas, Daylan, Daelan, Declan, Delman, Dyllon, Dilon, Dolan, Eilan, Milan, Gillean, Gillon, Gillian, Gillen, Gilian, Gilean, Keillan, Kellan, Killian, Killean, Kilian, Kilean, Mellan, Millen, Nollan, Quillan, Rollan, Tallan, Tillman and Tilman.