Where does “*Gworθɨɣern” come from?

*Gworθɨɣern (Proto-Brythonic) comes from Proto-Celtic Uɸortigernos, from Proto-Celtic uɸor-, from Proto-Indo-European upér, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

Ancestry of “*Gworθɨɣern”, step by step

StepLanguageWordMeaning
1Proto-CelticUɸortigernos
2Proto-Celticuɸor-over, super-
3Proto-Indo-Europeanupérabove; over
4Proto-Indo-Europeanupóunder, below
5Proto-Indo-Europeanh₃ewp-

Words derived from “*Gworθɨɣern

Every word from Proto-Indo-European h₃ewp-Every word from Proto-Indo-European upóEvery word from Proto-Indo-European upér