Where does “күңелле” come from?

күңелле (Tatar) comes from Bashkir күңел, from Proto-Turkic *köŋül — heart.

Ancestry of “күңелле”, step by step

Step	Language	Word	Meaning
1	Bashkir	күңел	a person's inner self, soul; emotional mind;...
2	Proto-Turkic	*köŋül	heart