Timur gave himself a title.
Timur ( تیمور Temūr , Chagatai : Temür , 9 April 1336 -- 18 February 1405 ) , historically known as Amir Timur and Tamerlane ( تيمور لنگ Temūr ( - i ) Lang , `` Timur the Lame '' ) , was a Turco-Mongol conqueror .