Meaning Derived from Celtic meaning 'little deer' used predominantly in the English and Irish languages. Origin of Osian Celtic , Irish +-100%Zoom level changed to 1 Popular Middle Names Royal Pronunciation 🔊 Listen Osian OS-i-an Similar Names Rian Alby Kiaron Rowan Kyran Lincon Bowen Triston Owain Barry Year by Year Popularity of Osian