Where does “Grifyuth” come from?

Grifyuth (Cornish) comes from Old Cornish Grifiud, from Proto-Brythonic Grifujʉð, from Proto-Brythonic grif, from Latin gryphus, from Ancient Greek γρύψ — griffin.

Ancestry of “Grifyuth”, step by step

StepLanguageWordMeaning
1Old CornishGrifiud
2Proto-BrythonicGrifujʉð
3Proto-Brythonicgrif
4LatingryphusAlternative form of gryps; griffin
5Ancient Greekγρύψgriffin
Every word from Ancient Greek γρύψEvery word from Latin gryphusEvery word from Proto-Brythonic grif