Where does “Arberth” come from?

Arberth (Welsh) comes from Welsh perth, from Brythonic *perθ, from Celtic *kʷerxtā, from Proto-Indo-European pérkus, from Proto-Indo-European perkʷ- — oak.

Ancestry of “Arberth”, step by step

StepLanguageWordMeaning
1Welshperthbush, hedge
2Brythonic*perθ—
3Celtic*kʷerxtā—
4Proto-Indo-Europeanpérkusoak
5Proto-Indo-Europeanperkʷ-oak
Every word from Proto-Indo-European perkʷ- →Every word from Proto-Indo-European pérkus →Every word from Celtic *kʷerxtā →