▁a ft . ▁ 3 0 ▁May ▁ 1 3 5 1 ), ▁daughter ▁of ▁Rudolf ▁I , ▁Elect or ▁of ▁Sax ony , ▁and ▁Duke ▁of ▁Sax e - W itt emberg . ▁Her ▁pat ernal ▁grand m other ▁Ag nes ▁of ▁H abs burg ▁was ▁a ▁daughter ▁of ▁Rud olph ▁I , ▁Holy ▁Roman ▁Emperor . ▁The ▁sp ouses ▁were ▁dist antly ▁related : ▁Elisabeth ' s ▁great - grand father ▁Albert ▁I , ▁Duke ▁of ▁Sax ony , ▁was ▁a ▁brother ▁of ▁Henry ▁I , ▁Count ▁of ▁An halt , ▁Wal dem ar ' s ▁great - gre at - grand father . ▁They ▁had ▁six ▁children : ▁Wal dem ar ▁II , ▁Prince ▁of ▁An halt - Z er bst ▁( d . ▁bef . ▁ 2 4 ▁August ▁ 1 3 7 1 ). ▁Be ate ▁( d . ▁ca . ▁ 1 3 7 9 ), ▁a ▁nun ▁at ▁Cos wig ▁( 1 3 7 5 ). ▁Soph ie ▁( d . ▁a ft . ▁ 6 ▁January ▁ 1 4 1 2 ), ▁a ▁nun ▁at ▁Cos wig ▁( 1 3 7 5 ). ▁Ag nes ▁( d . ▁a ft . ▁ 1 3 7 5 ), ▁a ▁nun ▁at ▁Cos wig ▁( 1 3 7 5 ). ▁Jud ith ▁( d . ▁a ft . ▁ 1 3 7 5 ), ▁a ▁nun ▁at ▁Cos wig ▁( 1 3 7 5 ). ▁( ?) ▁Ger tr ude ▁( d . ▁ca . ▁ 1