Dutch word kerstman comes from Dutch man, Dutch kerst (Christmas.)

Detailed word origin of kerstman

Dictionary entry	Language	Definition
man	Dutch (nld)	Husband, male spouse. Man, human male, either adult or age-irrespective.
kerst	Dutch (nld)	Christmas.
kerstman	Dutch (nld)	Father Christmas, Santa Claus.

Words with the same origin as kerstman