Hetoum I of Armenia

Hethum I Հեթում Ա
King
Hethum I with Queen Zabel on a coin
Predecessor	Isabella
Successor	Leo II
Dynasty	House of Lambron

Hethum I (died 1271) (also transliterated Hethoum, Hetoum, Het'um, or Hayton from Armenian: Հեթում Ա) ruled the Armenian Kingdom of Cilicia (also known as "Little Armenia") from 1226 to 1270. He was the son of Constantine, Lord of Baberon (d. 1263) and Princess Alix Pahlavouni of Lampron (a third-cousin of Leo I) and was the founder of the dynasty which bears his name: the Hetoumids. Due to diplomatic relations with the Mongol Empire, Hethum himself traveled to the Mongol court in Karakorum, Mongolia, which was recorded in the famous account The Journey of Haithon, King of Little Armenia, To Mongolia and Back by Hetoum's companion, the Armenian historian Kirakos Gandzaketsi.

Hethum's father Constantine had been regent for the young Queen Isabella of Armenia. Isabella originally married Philip (1222–1225), son of Bohemond IV of Antioch. However, Constantine had Philip disposed of, and instead forced Isabella to marry his own son, Hethum, on June 14, 1226, to make Isabell and Hethum co-rulers. The couple had six children:

Hethum was a major player in the political struggles and shifting alliances around the Crusader states, as the Armenians had ties with all sides. They were primarily aligned with the Europeans, but during Hethum's reign, the rapidly expanding Mongol Empire became a concern. As the Mongols approached the borders of Cappadocia and Cilicia, King Hethum made a strategic decision to submit to Mongol suzerainty, and sent his brother Sempad to the Mongol court in Karakorum. There, Sempad met Great khan Güyük, and made a formal agreement in 1247 in which Cilician Armenia would be considered a vassal state of the Mongol Empire. In 1254, Hethum himself traveled through Central Asia to Mongolia to renew the agreement, passing through the Turkish states of eastern Asia Minor, the Mongol camp at Kars in Greater Armenia, the Iron Gates of Derbent at the western shore of the Caspian Sea, and from there across Asia to Karakorum. He brought many sumptuous presents, and met with Möngke Khan (Güyük's cousin). The account of his travels was recorded by a member of his suite, Kirakos Gandzaketsi as "The Journey of Haithon, King of Little Armenia, To Mongolia and Back". The Journey of Hethoum was later translated into Russian, French, English, and Chinese. The narrative is important for its observations of Mongol, Buddhist, and Chinese culture, geography, and wildlife.