Where does “ᚉᚑᚅᚐᚅᚅ” come from?

ᚉᚑᚅᚐᚅᚅ (Primitive Irish) comes from Proto-Celtic kū, from Proto-Indo-European ḱwṓ — dog.

Ancestry of “ᚉᚑᚅᚐᚅᚅ”, step by step

Step	Language	Word	Meaning
1	Proto-Celtic	kū	dog; wolf
2	Proto-Indo-European	ḱwṓ	dog

ᚉᚑᚅᚐᚅᚅ — Etymology, Origin & Word History | Etymology Explorer