Where does “คาร์ดิฟฟ์” come from?

คาร์ดิฟฟ์ (Thai) comes from English Cardiff, from Welsh caer, from Proto-Celtic *kaɸerūxs — sheep.

Ancestry of “คาร์ดิฟฟ์”, step by step

Step	Language	Word	Meaning
1	English	Cardiff	The Welsh government
2	Welsh	caer	fort, fortress, enclosed stronghold, castle,...
3	Proto-Celtic	*kaɸerūxs	sheep