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Boris Kalamanos
Hungarian pretender · Lived 1113 to 1154 · aged 41
Boris, also known as Boris Kalamanos was a claimant to the Hungarian throne in the middle of the 12th century. He was the son of Euphemia of Kiev, the second wife of Coloman the Learned, King of Hungary.
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After Euphemia was caught in adultery, Coloman expelled her from Hungary and never acknowledged that he was Boris's father. However, Boris, who was born in the Kievan Rus', regarded himself as the king's lawful son. He laid claim to Hungary after Coloman's firstborn and successor, Stephen II of Hungary, died in 1131. Boris made several attempts to assert his claims against kings Béla II and Géza II with the assistance of Poland, the Holy Roman Empire and the Byzantine Empire, but failed and was killed in a battle.