Where does “Swydd Gaer” come from?

Swydd Gaer (Welsh) comes from Welsh swydd, from Middle Welsh swyð, from Proto-Brythonic *suɨð, from Latin sēdēs, from Latin sedeō, from Proto-Italic sedēō, from Proto-Indo-European sḗd- — to sit.

Ancestry of “Swydd Gaer”, step by step

Swydd Gaer traces back through two separate lines of ancestry.

via Welsh swydd

StepLanguageWordMeaning
1Welshswyddjob; office, post, position, capacity; county
2Middle Welshswyð
3Proto-Brythonic*suɨð
4Latinsēdēsseat, chair
5Latinsedeōto sit, to be seated
6Proto-Italicsedēōsit, be sitting, be seated
7Proto-Indo-Europeansḗd-to sit

via Welsh caer

StepLanguageWordMeaning
1Welshcaerfort, fortress, enclosed stronghold, castle,...
2Proto-Celtic*kaɸerūxssheep
Every word from Proto-Indo-European sḗd-