Where does “blwyddyn golau” come from?

blwyddyn golau (Welsh) comes from Welsh blwyddyn, from Old Welsh bloidin, from Proto-Celtic blēdanī, from Proto-Indo-European bʰloyd- — pale.

blwyddyn golau (Welsh): light year

Definitions

  1. light year

Ancestry of “blwyddyn golau”, step by step

blwyddyn golau traces back through two separate lines of ancestry.

via Welsh blwyddyn

StepLanguageWordMeaning
1Welshblwyddynyear
2Old Welshbloidin
3Proto-Celticblēdanīyear
4Proto-Indo-Europeanbʰloyd-pale

via Welsh golau

StepLanguageWordMeaning
1Welshgolaulight, bright
Every word from Proto-Indo-European bʰloyd-