Ok, since I posed the Turkey thread earlier, it’s only fitting I follow-up with this burning question:
Is there any relationship between the ottoman (foot rest) and the Ottoman Empire? Maybe they sat around all day on their duffs, with their feet up on their ottomans, and thus leading to the fall of the Ottoman Empire? 
Merriam Websters says:
Main Entry: ot·to·man
Pronunciation: 'ä-t&-m&n
Function: noun
Date: 1605
1 capitalized a : a member of a Turkish dynasty founded by Osman I that ruled the Ottoman Empire b : a citizen or functionary of the Ottoman Empire
2 [French ottomane, from feminine of ottoman, adjective] a : an upholstered often overstuffed seat or couch usually without a back b : an overstuffed footstool
3 : a heavy clothing fabric characterized by pronounced crosswise ribs
Not very helpful but at least a step along the path of knowledge on this crucial question
The Collins English Dictionary gives Ottoman (as in the Empire) as *C17: from French, via Medieval Latin, from Arabic *Othmani Turkish, from Turkish Othman Osman I.
Same century, same language.
i have never heard of a footstool refered to as an ottoman before
From the Britannica:
Really? I’ve always called it an ottoman.
In thinking it over, my above post sounds very “smart ass” like. I just wanted to say that is not how I meant it to sound.
Let me be the first to insert the obligatory Dead Milkmen reference.