Where does “Mercuur” come from?

Mercuur (Dutch) comes from Latin Mercurius, from Latin merx, from Proto-Italic *merks.

Mercuur (Dutch): Mercury

Definitions

Step	Language	Word	Meaning
1	Latin	Mercurius	Mercury; a Roman god associated with speed and...
2	Latin	merx	merchandise, commodity; goods, wares
3	Proto-Italic	*merks	—

Mercuur — Etymology, Origin & Word History | Etymology Explorer