Meaning A boy's name of Gaelic origin, it means "Child." Origin of Cailen Gaelic , Irish +-100%Zoom level changed to 1 Popular Middle Names Liam, Wesley Pronunciation 🔊 Listen Cailen Similar Names Coll Cailan Cullen Colm Caelan Peadar Bealantin Gabhan Gille Raibeart Year by Year Popularity of Cailen