Where does “Cavalciuc” come from?

Cavalciuc (Romanian) comes from Ukrainian Ковальчук, from Ukrainian -чук, from Ukrainian -ко, from Proto-Slavic -ьko.

Ancestry of “Cavalciuc”, step by step

StepLanguageWordMeaning
1UkrainianКовальчукsmith's young son
2Ukrainian-чукadded to a stem to form a patronymic or matronymic surname
3Ukrainian-коCreates diminutives of normally neuter nouns and adverbs, normally having a colloquial register
4Proto-Slavic-ьko—
Every word from Proto-Slavic -ьko →Every word from Ukrainian -ко →Every word from Ukrainian -чук →