Where does “rydzy” come from?

rydzy (Polish) comes from Old Polish rydzy, from Proto-Slavic ryďь, from Proto-Balto-Slavic rūˀdjas, from Proto-Indo-European h₁ruHdʰ-yo-s, from Proto-Indo-European h₁rudʰ-yo-s, from Proto-Indo-European h₁rewdʰ- — red.

Ancestry of “rydzy”, step by step

StepLanguageWordMeaning
1Old Polishrydzyrust, rusty copper, fulvous, red-yellow
2Proto-Slavicryďьginger (as a colour), red
3Proto-Balto-Slavicrūˀdjas
4Proto-Indo-Europeanh₁ruHdʰ-yo-s
5Proto-Indo-Europeanh₁rudʰ-yo-s
6Proto-Indo-Europeanh₁rewdʰ-red
Every word from Proto-Indo-European h₁rewdʰ-Every word from Proto-Indo-European h₁rudʰ-yo-sEvery word from Proto-Indo-European h₁ruHdʰ-yo-s