Machna was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Beneš Černohorský z Boskovic. They were married, but the date and place have not been found. Their nine known children were Markéta (?-1516), Jitka (?-?), Jindřich (?-1476), Barbora (?-?), Mandalena (?-1551), Dobeš (?-1493), Tas (?-1482), Beneš II (1456-1507) and Jan (1461->1473).