Dutch word regelmaat comes from Dutch regel, Dutch maat (Size, measure. Mate, buddy. Shipmate etc.)

Detailed word origin of regelmaat

Dictionary entry	Language	Definition
regel	Dutch (nld)	Line of writing, verse; (pre-printed) straight line to write it on. Narrow slat; especially a ruler. Rule, regulation, custom, prescript.
maat	Dutch (nld)	Size, measure. Mate, buddy. Shipmate etc.
regelmaat	Dutch (nld)	Regularity.

Words with the same origin as regelmaat