Catherine of Anhalt-Bernburg
Catherine of Anhalt-Bernburg (c. 1330–1390) was a princess of the House of Ascania, the daughter of Bernhard III of Anhalt-Bernburg and Agnes of Saxe-Wittenberg. In 1356 she married Magnus II, Duke of Brunswick-Lüneburg, and bore him numerous children, including three future dukes of Brunswick.
Magnus lost Lüneburg to Albert of Saxe-Wittenberg in 1370 and fell in battle in 1373 in the war that followed. In 1374 Catherine married his rival Albert, Duke of Lüneburg, and died in 1390.