Where does “اوجاقجی” come from?

اوجاقجی (Ottoman Turkish) comes from Ottoman Turkish اوجاق, from Proto-Turkic *ōtčak.

Ancestry of “اوجاقجی”, step by step

Step	Language	Word	Meaning
1	Ottoman Turkish	اوجاق	stove, oven, kiln, furnace; fireplace; chimney
2	Proto-Turkic	*ōtčak	—

اوجاقجی — Etymology, Origin & Word History | Etymology Explorer