Where does “オットマン” come from?

オットマン (Japanese) comes from English Ottoman, from Middle French Ottoman, from Italian ottomano, from Ottoman Turkish osman, from Arabic عُثْمَان.

オットマン (Japanese): ottoman; Ottoman

Definitions

Step	Language	Word	Meaning
1	English	Ottoman	A Turk from the period of Ottoman Empire; Of the...
2	Middle French	Ottoman	—
3	Italian	ottomano	Ottoman
4	Ottoman Turkish	osman	—
5	Arabic	عُثْمَان	—

オットマン — Etymology, Origin & Word History | Etymology Explorer