Where does “dzieciątyszko” come from?

dzieciątyszko (Polish) comes from Polish dzieciątko, from Polish -ko, from Old Polish -ko, from Proto-Slavic -ъko.

Ancestry of “dzieciątyszko”, step by step

StepLanguageWordMeaning
1Polishdzieciątko—
2Polish-koDiminutive suffix for neuter nouns
3Old Polish-kodiminutive suffix for neuter nouns; may cause various vowel shifts
4Proto-Slavic-ъko—
Every word from Proto-Slavic -ъko →Every word from Polish -ko →Every word from Old Polish -ko →