Talk:Operator/@comment-198.13.236.63-20151225184536/@comment-116.58.232.82-20160114152012

All three are correct. Hayden's name originates from the Japanese word. The Tenno in Warframe kept the name from Hayden, likely since Hayden was an offshoot of the original idea of the Tenno/Warframe. The in-game explanation is the Zariman Ten-oh.