Meaning A boy's name of Celtic origin, it means "Mythical father of Teithi." Origin of Gwynham Celtic , Irish +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Gwynham Similar Names Celyddon Clustfeinad Mynogan Yspaddaden Nisien Glifieu Gruddieu Gwernaeh Abul Fazl Culain Year by Year Popularity of Gwynham