Helena of Rügen
Helena of Rügen (c. 1270/1272 – 1315) was the daughter of Wizlaw II, Prince of Rügen, and Agnes of Brunswick-Lüneburg. In November 1288 she married John III, Lord of Mecklenburg; their daughter Luitgard was born around 1289, but John drowned near Poel in May 1289 after only seven months of marriage.
In December 1302 she married Bernhard II, Prince of Anhalt-Bernburg. She bore him three sons, including his successor Bernhard III, and died in 1315.