Meaning A boy's name of Welsh origin, it means "Variant of Mervyn: Form of Merlin: From the sea fortress Origin of Marvyn Welsh +-100%Zoom level changed to 1 Popular Middle Names Sanchez, Manuel Pronunciation 🔊 Listen Marvyn Similar Names Mervin Merv Myrddin Merlyn Merwyn Dillan Caerwyn Dillion Dyllan Marwin Year by Year Popularity of Marvyn