Where does “oes” come from?

oes (Welsh) comes from Old Welsh ois, from Proto-Brythonic oɨs, from Proto-Celtic aiwestom, from Proto-Indo-European h₂ey- — vital force, life, age, eternity; day, morning.

oes (Welsh): is there; are there; yes; age, period

Definitions

  1. is there; are there; yes; age, period

Ancestry of “oes”, step by step

oes traces back through two separate lines of ancestry.

via Old Welsh ois

StepLanguageWordMeaning
1Old Welshois—
2Proto-Brythonicoɨsage
3Proto-Celticaiwestomage; lifetime; era
4Proto-Indo-Europeanh₂ey-vital force, life, age, eternity; day, morning

via Proto-Celtic esti

StepLanguageWordMeaning
1Proto-Celticestito be
2Proto-Indo-European*h₁ésti—

Words derived from “oes”

Every word from Proto-Indo-European h₂ey- →Every word from Proto-Celtic aiwestom →Every word from Proto-Brythonic oɨs →