Where does “ku” come from?
ku (Middle Welsh) comes from Proto-Brythonic kʉβ̃, from Proto-Celtic koimos, from Proto-Indo-European ḱóymos, from Proto-Indo-European ḱey- — to be lying down; to settle.
Ancestry of “ku”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Proto-Brythonic | kʉβ̃ | dear, nice |
| 2 | Proto-Celtic | koimos | dear, nice |
| 3 | Proto-Indo-European | ḱóymos | of the home, belonging to the family; village,... |
| 4 | Proto-Indo-European | ḱey- | to be lying down; to settle |