Where does “Kokkonen” come from?

Kokkonen (Finnish) comes from Finnish Kokko, from Proto-Finnic kokkoi, from Proto-Finnic kokka — hook.

Ancestry of “Kokkonen”, step by step

Step	Language	Word	Meaning
1	Finnish	Kokko	—
2	Proto-Finnic	kokkoi	—
3	Proto-Finnic	kokka	hook

Kokkonen — Etymology, Origin & Word History | Etymology Explorer