Ladislaus IV of Hungary

Ladislaus the Cuman Lszl , Croatian Ladislav IV. Kumanac , Slovak Ladislav IV. Kumnsky August 1262160July 1290, also known as Ladislas the Cuman, was King of Hungary and Croatia from 1272 to 1290. His mother, Elizabeth, was the daughter of a chieftain from the pagan Cumans who had settled in Hungary. At the age of seven, he married Elisabeth , a daughter of King Charles I of Sicily. Ladislaus was only ten when a rebellious lord, Joachim Gutkeled, kidnapped and imprisoned him.

Ladislaus was the elder son of Stephen V, son of Bla IV of Hungary, and Stephens wife, Elizabeth the Cuman. Elizabeth was the daughter of a chieftain of the Cumans who had settled in Hungary. She was born as a pagan and was only baptized before her marriage to Stephen. Ladislaus was born under the sign of Mars in 1262, according to Simon of Kza, who was his chaplain in the 1270s.

Source: Wikipedia