Callan \c(al)-lan\ as a boy's name (also used as girl's name Callan), is pronounced KAL-an. It is of Gaelic and Scottish origin, and the meaning of Callan is "battle; rock". From an Irish surname derived from Cathan, or a Scottish surname from "ail" meaning "rock". A male name in Scotland and Ireland. Scottish Gaelic variant is Cailean. In Irish, it is Callathian which is commonly anglicized to Callan.
Callan has 1 variant form: Cailean.