Where does “*kòťьka” come from?

*kòťьka (Proto-Slavic) comes from Proto-Slavic *kòťь, from Proto-Slavic kǫtъ, from Latin cattus, from Latin catta — a cat.

Ancestry of “*kòťьka”, step by step

Step	Language	Word	Meaning
1	Proto-Slavic	*kòťь	—
2	Proto-Slavic	kǫtъ	corner
3	Latin	cattus	a cat
4	Latin	catta	a cat

*kòťьka — Etymology, Origin & Word History | Etymology Explorer