Euphemia of Kiev

Euphemia of Kiev
Born	Kiev, Kievan Rus' (now Ukraine)
Died	4 April 1139 Kiev
Spouse	Coloman, King of Hungary (divorced)
Issue	Boris
House	Rurik dynasty
Father	Vladimir II Monomakh
Mother	Unknown (Vladimir's second wife)

Evfimija Vladimirovna (Russian: Евфимия Владимировна), known as Euphemia of Kiev (fl. 1112–died 4 April 1139) was Queen Consort of Hungary. Euphemia was the daughter of Grand Prince Vladimir II of Kiev and his second wife, whose name and ancestry are unknown. She was married to King Coloman of Hungary around 1112. However, her husband, who had been suffering from a serious disease, caught her in adultery and immediately sent her back to Kiev. Euphemia gave birth to her son, Boris (1113 – 1155/1156), in her father's court, but the son was never recognised by King Coloman. Afterwards, she lived in a monastery near Kiev till her death.

...
Wikipedia