Where does “Aoki” come from?

Aoki comes from Japanese 青木, composed of Japanese 木 and Old Japanese 木, ultimately from Proto-Japonic awo, with the final element's original meaning uncertain.

Ancestry of “Aoki”, step by step

Step	Language	Word	Meaning
1	Japanese	青木	Japanese laurel
2	Japanese	木	a tree or shrub; wood, timber, lumber; a tree
3	Old Japanese	木	a tree or shrub; wood, timber, lumber; Combining...
4	Proto-Japonic	kəy	tree

Every word from Proto-Japonic kəy →Every word from Old Japanese 木 →Every word from Japanese 木 →