Where does “Osmanli” come from?

Osmanli derives from Ottoman Turkish عثمانلو, referring to the Ottoman Empire and its people, though the precise original sense remains uncertain.

Osmanli (English): Ottoman Turk

Definitions

Step	Language	Word	Meaning
1	Turkish	Osmanlı	Ottoman
2	Ottoman Turkish	osman	—
3	Arabic	عُثْمَان	—

Osmanli — Etymology, Origin & Word History | Etymology Explorer