Meaning A boy's name of Gaelic origin, it means "From the Gray Fortress." Origin of Liosliath Gaelic , Irish Popular Middle Names Pronunciation 🔊 Listen Liosliath Similar Names Blakey Blandford Gowyn Kelle Beagin Frannsaidh Gayner Gervin Muireach Raghallach Year by Year Popularity of Liosliath