Dutch word hamerhaai comes from Dutch hamer (Hammer.), Dutch haai (Greedy person. Shark.)

Detailed word origin of hamerhaai

Dictionary entry	Language	Definition
hamer	Dutch (nld)	Hammer.
haai	Dutch (nld)	Greedy person. Shark.
hamerhaai	Dutch (nld)	Hammerhead shark, any shark of the Sphyrnidae.