Where does “зайченятко” come from?

зайченятко (Ukrainian) comes from Ukrainian зайченя, from Ukrainian заєць, from Proto-Slavic zajęcь, from Proto-Balto-Slavic *źṓjinkas, from Proto-Indo-European ǵʰey- — winter.

Ancestry of “зайченятко”, step by step

StepLanguageWordMeaning
1Ukrainianзайченяyoung hare
2Ukrainianзаєцьhare
3Proto-Slaviczajęcьrabbit, hare
4Proto-Balto-Slavic*źṓjinkasrabbit, hare
5Proto-Indo-Europeanǵʰey-winter
Every word from Proto-Indo-European ǵʰey- →Every word from Proto-Balto-Slavic *źṓjinkas →Every word from Proto-Slavic zajęcь →