Original: Marcus Ulpius Nerva Traianus , commonly known as Trajan ( 18 September 53 8 August 117 ) , was a Roman Emperor who reigned from A. D. 98 until his death in A. D. 117 .
Simplified: Marcus Ulpius Nerva Traianus , commonly called Trajan ( September 18 , 53 -- August 9 , 117 ) was Roman Emperor in 98 -- 117 .