Where does “znamienitszy” come from?

znamienitszy (Polish) comes from Polish -szy, from Old Polish -szy, from Proto-Slavic *-jьjь.

Ancestry of “znamienitszy”, step by step

StepLanguageWordMeaning
1Polish-szyforms comparative adjectives; -er
2Old Polish-szyforms comparative adjectives; -er
3Proto-Slavic*-jьjь—
Every word from Proto-Slavic *-jьjь →Every word from Polish -szy →Every word from Old Polish -szy →