Kilian \k(i)-lian\ as a boy's name is a variant of Killian (Irish, Gaelic), and the meaning of Kilian is "bright-headed".

The baby name Kilian sounds like Gilian and Kilean. Other similar baby names are Ailin, Ailean, Kian, Kieran, Cillian, Dillan, Dilan, Eilan, Elian, Milan, Gillian, Gillan, Gilean, Julian, Kalin, Kalan, Kelan, Keillan, Keilan, Kienan, Kellan, Kelvan, Kiran, Killean and Kylan.