Dutch word mijnheer comes from Dutch mijn, Dutch heer ((archaic) army Gentleman. Lord; master.)

Detailed word origin of mijnheer

Dictionary entry	Language	Definition
mijn	Dutch (nld)	Belonging to me: my Mine (device meant to explode when stepped upon or touched). Mine (place where ore is taken out of the ground).
heer	Dutch (nld)	(archaic) army Gentleman. Lord; master.
mijnheer	Dutch (nld)

Words with the same origin as mijnheer