Where does “-iedyddion” come from?

-iedyddion (Welsh) comes from Welsh -iedydd, from Welsh -iad, from Proto-Brythonic -ad, from Proto-Brythonic -atus, from Proto-Brythonic -ātus.

Ancestry of “-iedyddion”, step by step

StepLanguageWordMeaning
1Welsh-iedyddsuffix indicating a person, or rarely an animal or plant, especially an agent noun: -er, -or, -ist
2Welsh-iadshow the action of a verb or its result; suffix...
3Proto-Brythonic-ad—
4Proto-Brythonic-atus—
5Proto-Brythonic-ātus—
Every word from Proto-Brythonic -ātus →Every word from Welsh -iad →Every word from Proto-Brythonic -ad →
-iedyddion — Etymology, Origin & Word History | Etymology Explorer