Where does “нічка” come from?

нічка (Ukrainian) comes from Ukrainian ніч, from Old East Slavic ночь, from Proto-Slavic *nòťь — night.

Ancestry of “нічка”, step by step

StepLanguageWordMeaning
1Ukrainianнічnight
2Old East Slavicночьnight
3Proto-Slavic*nòťьnight
Every word from Proto-Slavic *nòťь →Every word from Old East Slavic ночь →Every word from Ukrainian ніч →