Where does “rud” come from?

rud (Old Cornish) comes from Proto-Brythonic rrʉð, from Proto-Celtic roudos, from Proto-Indo-European h₁rewdʰ- — red.

Ancestry of “rud”, step by step

StepLanguageWordMeaning
1Proto-Brythonicrrʉðred
2Proto-Celticroudosred
3Proto-Indo-Europeanh₁rewdʰ-red

Words derived from “rud”

Every word from Proto-Indo-European h₁rewdʰ- →Every word from Proto-Celtic roudos →Every word from Proto-Brythonic rrʉð →