Where does “tonnau” come from?
tonnau (Welsh) comes from Welsh tôn, from Middle Welsh tonn, from Proto-Brythonic *tonn, from Proto-Celtic tundā, from Proto-Indo-European (s)tewd-, from Proto-Indo-European stew- — to praise, laud.
tonnau (Welsh): plural of ton
Ancestry of “tonnau”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Welsh | tôn | tone, sound; tune, melody |
| 2 | Middle Welsh | tonn | — |
| 3 | Proto-Brythonic | *tonn | — |
| 4 | Proto-Celtic | tundā | wave, billow |
| 5 | Proto-Indo-European | (s)tewd- | to push, to hit |
| 6 | Proto-Indo-European | stew- | to praise, laud |