Where does “Uur” come from?

Uur (Low German) comes from Proto-Germanic ūra-, from Proto-Indo-European (s)wūr-.

Ancestry of “Uur”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	ūra-	ferriferous sand
2	Proto-Indo-European	(s)wūr-	—

Uur — Etymology, Origin & Word History | Etymology Explorer