Where does “każdziuleńki” come from?

każdziuleńki (Polish) comes from Polish każdy, from Old Polish każdy, from Proto-Slavic *kažьde.

Ancestry of “każdziuleńki”, step by step

StepLanguageWordMeaning
1Polishkażdyeach, every
2Old Polishkażdyeach, every
3Proto-Slavic*kažьde—
Every word from Proto-Slavic *kažьde →Every word from Old Polish każdy →Every word from Polish każdy →