Meaning A boy's name of Gaelic origin, it means "Tranquil." Origin of Gaylen Gaelic , Irish +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Gaylen Similar Names Gaelan Galyn Akhmad Gabhan Gearald Gille Galan Bealantin Raibeart Stiabhan Year by Year Popularity of Gaylen