Around 1321 he took part in the Battle on the Irpin River against the Russian and Tatar troops of Grand Prince of Kiev Stanislav Ivanovich, and after the latter's defear, his father, Mindovg Olgimuntovich became the Lithuanian governor of Principality of Kiev. After his father's death, Olgimunt received the administration of the Principality of Kiev. He fought against the Princes of Putivl and Chernigov of the Olgovich family, who with the help of the Golden Horde wanted to regain the reign of Kiev, and about 1331 lost it/ His further fate is unknown. He was baptized Mikhail (sometimes also called Boris) and, before his death, he took a monastic vows under the name of Euphemius.
|Offspring of Olgimunt Mingovtovich Olshansky and unknown parent|
|Ivan Olgimuntovich Olshansky (c1340-1402)||1340||1402||Agrippina of Smolensk (c1355-c1410)|