Where does “cymraes” come from?
cymraes (Welsh) comes from Welsh cymro, from Proto-Brythonic kömroɣ, from Proto-Brythonic brogos, from Proto-Celtic mrogis, from Proto-Indo-European morǵ- — edge, boundary, border; frontier, border.
Ancestry of “cymraes”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Welsh | cymro | — |
| 2 | Proto-Brythonic | kömroɣ | compatriot, comrade |
| 3 | Proto-Brythonic | brogos | country |
| 4 | Proto-Celtic | mrogis | border, borderland, march, mark; region, country,... |
| 5 | Proto-Indo-European | morǵ- | edge, boundary, border; frontier, border |