 The majority of the Wiśniowiecki family estates were found on the eastern side of the <unk> River ( <unk> , Ruthenian and Kiev <unk> ) , and most of them were acquired by Jeremi 's grandfather , Aleksander Wiśniowiecki , in the 16th century . The capital of his estate was located at a fortified manor at Lubny , where his father rebuilt an old castle ; the population of the town itself could be estimated at about 1 @,@ 000 . Wiśniowiecki inherited lands inhabited , according to an estimate from 1628 , by about 4 @,@ 500 people , of which Lubny was the largest town . Smaller towns in his lands included <unk> , <unk> and <unk> . By 1646 his lands were inhabited by 230 @,@ 000 people . The number of towns on his lands rose from several to about thirty , and their population increased as well . The prosperity of those lands reflected Wiśniowiecki 's skills in economic management , and the income from his territories ( estimated at about 600 @,@ 000 <unk> yearly ) made him one of the wealthiest magnates in the Commonwealth . Because of its size and relatively consistent borders , Wiśniowiecki 's estate was often named <unk> ( " <unk> " ) . 
