Meaning Thornleigh is a boys name of Celtic origin, it means a meadow of thorns. Origin of Thornleigh Celtic , Irish +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Thornleigh thorn-leigh Similar Names Thorn Thornton Thronton Annan Artek Artis Arty Atre Artturi Arto Year by Year Popularity of Thornleigh