Where does “serydd” come from?

serydd (Welsh) comes from Welsh sêr, from Old Welsh serr, from Proto-Celtic serrā, from Proto-Indo-European serp- — to creep, crawl.

Ancestry of “serydd”, step by step

StepLanguageWordMeaning
1Welshsêrstars; asterisks
2Old Welshserr—
3Proto-Celticserrāsickle, scythe; billhook
4Proto-Indo-Europeanserp-to creep, crawl
Every word from Proto-Indo-European serp- →Every word from Proto-Celtic serrā →Every word from Old Welsh serr →