Meaning A boy's name of Gaelic origin, it means "Man from South Munster." Origin of Desmon Gaelic , Irish Popular Middle Names Damon, Earl Pronunciation 🔊 Listen Desmon Similar Names Deasmumhan Deasach Derwynn Diarmaid Dallan Dermot Donal Beagin Frannsaidh Gayner Year by Year Popularity of Desmon