Troednodyn
d Gweler The Encyclopedia of Religion, Cyfrol 4, tudalen 165; The Encyclopedia Americana, Cyfrol 8, tudalen 246; a Symbols Around Us, tudalennau 205-207.
d Gweler The Encyclopedia of Religion, Cyfrol 4, tudalen 165; The Encyclopedia Americana, Cyfrol 8, tudalen 246; a Symbols Around Us, tudalennau 205-207.