Meaning A boy's name of Scottish origin, it means "fruitful; producing offspring." Origin of Sioltach Scottish , Celtic +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Sioltach Similar Names Aled Jarod Stirling Ephram Ephrem Ephron Efrayim Efraim Efran Eustace Year by Year Popularity of Sioltach