Meaning A boy's name of Welsh origin, it means "Fair town Abbreviation of Trevelyan Origin of Trevyn Welsh Popular Middle Names Everett, Robert Pronunciation 🔊 Listen Trevyn Similar Names Trevan Trevian Trevion Travon. Trevonn Traveon trevon Trefor Tremain Gwynfor Caerwyn Year by Year Popularity of Trevyn