Yuri Simeonovich ( â 17 April 1542) was the prince of Kopyl and Slutsk from 1503 until his death in 1542. He was from the Olelkovich family of the Grand Duchy of Lithuania and was a son of Simeon Mikhailovich Slutsky and Anastasia Slutskaya.
Yury was born . He became the prince of Kopyl and Slutsk in 1503 after his father Simeon died. He was an influential member of the Lithuanian Council of Lords.
He participated in the Battle of Olshanitsa and in the Battle of Orsha
In about 1531, Simeon married Helena from the Radziwià Âà  family, a daughter of Mikolaj II Radziwill.
Yury died on 17 April 1542, and was succeeded by his son Simeon as prince.
Simeon, briefly married to Elizaveta Ostrogska,daughter of Ilia Ostrogski. Simeons aunt had been married to Ostrogskas grand-father. The marriage was annulled on the order of Sigismund II Augustus, the king of Poland.
Yuri, married Katarzyna TÃÂczyà Âska and had issue.
Sophia, married Jerzy Chodkiewicz and had issue.