Genghis Khan - Khagan of Mongol Empire from Spring 1206 to August 18, 1227
Genghis Khan or Temüjin Borjigin was the founder and first Great Khan of the Mongol Empire, which became the largest contiguous empire in history after his death. He came to power by uniting many of the nomadic tribes of Northeast Asia.

After founding the Empire and being proclaimed "Genghis Khan", he launched the Mongol invasions that conquered most of Eurasia. Campaigns initiated in his lifetime include those against the Qara Khitai, Caucasus, and Khwarazmian, Western Xia and Jin dynasties. These campaigns were often accompanied by large-scale massacres of the civilian populations – especially in the Khwarazmian and Western Xia controlled lands. By the end of his life, the Mongol Empire occupied a substantial portion of Central Asia and China.

Before Genghis Khan died he assigned Ögedei Khan as his successor. Later his grandsons split his empire into khanates. Genghis Khan died in 1227 after defeating the Western Xia. He was buried in an unmarked grave somewhere in Mongolia. His descendants extended the Mongol Empire across most of Eurasia by conquering or creating vassal states in all of modern-day China, Korea, the Caucasus, Central Asia, and substantial portions of Eastern Europe and Southwest Asia. Many of these invasions repeated the earlier large-scale slaughters of local populations. As a result, Genghis Khan and his empire have a fearsome reputation in local histories.
Genghis Khan
King of Kings Genghis Khan of Mongol Empire

(1) Genghis Khan 1206 - 1227 AD
Obverse: Defender of the Faith, Commander of the Faithful
Reverse: The Just, Supreme Khan
Ref: Tye 329