Gilian \gi-lian\ as a boy's name (also used as girl's name Gilian), is a variant of Gillean (Irish, Gaelic), and the meaning of Gilian is "servant of Saint John".

The baby name Gilian sounds like Gillian, Gillan, Gilean and Kilian. Other similar baby names are Gilman, Ailin, Ailean, Cillian, Dillan, Dilan, Eilan, Elian, Milan, Galin, Galan, Gian, Gilson, Gilad, Gilead, Gilam, Gillon, Gillion, Gillen, Gillman, Gilon, Gili, Gilray, Giovan, Giuliano, Glinn, Glin, Julian, Killian and Kilean.