Meaning Of Welsh origin, meaning 'sea', Dylan is a popular name for girls and growing in popularity for boys. Origin of Dilan Welsh +-100%Zoom level changed to 1 Popular Middle Names Adam, Adrian, Daniel, Elijah, Harry, Isaac, James, Matteo, Osvaldo, Reinier Pronunciation 🔊 Listen Dilan DIL-an Similar Names Dyland Dillion Dyllan Dillon Dycan Dillan Braden Dylan Dylen Connor Year by Year Popularity of Dilan