Where does “rpy” come from?

rpy (Demotic) comes from Egyptian r-pr, from Egyptian r, from Egyptian rꜣ — goose; an item of baked goods shaped like a...

Ancestry of “rpy”, step by step

Step	Language	Word	Meaning
1	Egyptian	r-pr	false door; temple
2	Egyptian	r	opening, division; mouth; speaker, mouthpiece
3	Egyptian	rꜣ	goose; an item of baked goods shaped like a...