Where does “hamer” come from?

hamer (Dutch) comes from Middle Dutch hāmer, from Old Dutch hamar, from Proto-West Germanic *hamar, from Proto-Germanic hamaraz, from Proto-Indo-European h₂eḱmoros, from Proto-Indo-European h₂éḱmō, from Proto-Indo-European h₂eḱ- — sharp.

hamer (Dutch): A hammer