Where does “hadh” come from?

hadh (Yola) comes from Middle English hadde, from Old English hæfde, from Proto-Germanic habd-.

Ancestry of “hadh”, step by step

Step	Language	Word	Meaning
1	Middle English	hadde	had
2	Old English	hæfde	inflection of habban: ## first/third-person...
3	Proto-Germanic	habd-	—