Meaning A boy's name of Celtic origin, it means "Mythical king of Connaught." Origin of Ailill Celtic , Irish +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Ailill Similar Names Lairgnen Arawn Bhoomindra Lir Nisien Aod Phaneesh Ruairi Tincommius Ruy Year by Year Popularity of Ailill