Where does “Hamari” come from?

Hamari (Finnish) comes from Old Swedish hamar, from Old Norse hamarr, from Proto-Germanic hamaraz, from Proto-Indo-European h₂eḱmoros, from Proto-Indo-European h₂éḱmō, from Proto-Indo-European h₂eḱ- — sharp.

Ancestry of “Hamari”, step by step

Step	Language	Word	Meaning
1	Old Swedish	hamar	hammer; mountain height, outcrop
2	Old Norse	hamarr	stone; a steep cliff, crag, a rock face; hammer
3	Proto-Germanic	hamaraz	hammer
4	Proto-Indo-European	h₂eḱmoros	—
5	Proto-Indo-European	h₂éḱmō	stone
6	Proto-Indo-European	h₂eḱ-	sharp

Every word from Proto-Indo-European h₂eḱ- →Every word from Proto-Indo-European h₂éḱmō →Every word from Proto-Indo-European h₂eḱmoros →