Cailean \ca(i)-lean\ as a boy's name is a variant of Caelan (Gaelic), Callan (Gaelic, Scottish) and Colin (Irish, Scottish, Gaelic), and the meaning of Cailean is "battle; rock; young creature".

The baby name Cailean sounds like Calan, Cailin, Gilean and Kilean. Other similar baby names are Ailean, Caile, Cailey, Caiden and Caidan.