Meaning A boy's name of Gaelic origin, it means "Gaelic Form of Mungo." Origin of Mungan Gaelic , Irish Popular Middle Names Pronunciation 🔊 Listen Mungan Similar Names Beagin Frannsaidh Gayner Gervin Raghallach Steaphan Dallan Donal Rioghbhardan Findlay Year by Year Popularity of Mungan