Jagoldai
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Jagoldai, Cağalday (Polish: Jaholdaj ) (pronounce: yah-gohl-DAI or jah-ghahl-DAY) – little Tatar tyumen (duchy) in today Kursk Oblast of Russia, vassal of the Grand Duchy of Lithuania in 15th-16th century. Was founded in 1438 by Tatars of Golden Horde.