 Jeremi Michał <unk> Wiśniowiecki was born in 1612 ; neither the exact date nor the place of his birth are known . His father , Michał Wiśniowiecki , of the Lithuanian @-@ Ruthenian Wiśniowiecki family , died soon after Jeremi 's birth , in 1616 . His mother , Regina <unk> ( <unk> <unk> ) was a <unk> @-@ born noble woman of the <unk> family , daughter of the <unk> Prince <unk> <unk> , Jeremy 's namesake ; she died in 1619 . Both of his parents were of the Eastern Orthodox Church rite ; Jeremy 's uncle was the influential Orthodox theologian Peter Mogila , and his great @-@ uncle was George Mogila , the Metropolitan of Moldavia . 
