Where does “Graham” come from?

Graham comes from Old English grand, though its original meaning is uncertain.

Ancestry of “Graham”, step by step

Step	Language	Word	Meaning
1	English	Grantham	—
2	Old English	hām	home; village, community; village, hamlet, manor,...
3	Proto-West Germanic	haim	home
4	Proto-Germanic	haimaz	home; house; village
5	Proto-Indo-European	ḱóymos	of the home, belonging to the family; village,...
6	Proto-Indo-European	ḱey-	to be lying down; to settle

Graham — Etymology, Origin & Word History | Etymology Explorer