Meaning A boy's name of Welsh origin, it means "From Caerleon." Origin of Caer Llion Welsh Popular Middle Names Pronunciation 🔊 Listen Caer Llion Similar Names Erbin Fercos Fychan Gawain Gwallawg Gwydyon Kywrkh Llyweilun Manawydan Menw Year by Year Popularity of Caer Llion