Where does “Siwiec” come from?

Siwiec (Polish) comes from Polish siwiec, from Polish -ec, from Old Polish -ec, from Proto-Slavic -ьcь, from Lithuanian -ikas, from Proto-Indo-European -iḱos — -y, -ic.

Ancestry of “Siwiec”, step by step

StepLanguageWordMeaning
1PolishsiwiecA grey-haired man; A plant of the genus Glaucum;...
2Polish-ecA masculine suffix
3Old Polish-ecforms nouns
4Proto-Slavic-ьcьForms diminutives from nouns; Forms nouns from...
5Lithuanian-ikas—
6Proto-Indo-European-iḱos-y, -ic
Every word from Proto-Indo-European -iḱos →Every word from Polish -ec →Every word from Proto-Slavic -ьcь →