Meaning A boy's name of Gaelic origin, it means "Peaceful." Origin of Tuathal Gaelic , Irish +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Tuathal Similar Names Tulley Sheehan Peadar Bealantin Gabhan Gearald Gille Mungan Raibeart Stiabhan Year by Year Popularity of Tuathal