Gillean \gi(l)-lean\ as a boy's name is of Irish and Gaelic origin, and the meaning of Gillean is "servant of Saint John". Related to names like Gilchrist, Gillespie, and Gilmore.

Gillean has 8 variant forms: Gilean, Gilian, Gillan, Gillen, Gilleon, Gillian, Gillion and Gillon.

Baby names that sound like Gillean are Killean, Gaillen, Killian and Kilean.