Where does “tyðyn” come from?
tyðyn (Middle Welsh) comes from Middle Welsh ty, from Proto-Brythonic tɨɣ, from Proto-Celtic tegos, from Proto-Indo-European (s)teg- — to cover; pole, stick, beam.
Ancestry of “tyðyn”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Middle Welsh | ty | — |
| 2 | Proto-Brythonic | tɨɣ | house |
| 3 | Proto-Celtic | tegos | house, dwelling |
| 4 | Proto-Indo-European | (s)teg- | to cover; pole, stick, beam |