ⲫⲱⲥⲧⲏⲣ (Coptic) comes from Ancient Greek φωστήρ, from Ancient Greek φῶς, from Proto-Hellenic pʰáos, from Proto-Indo-European bʰéh₂os, from Proto-Indo-European bʰeh₂-, from Proto-Indo-European bʰeh₂-s-ri-.
ⲫⲱⲥⲧⲏⲣ (Coptic): planet