Rixa of Werle
Rixa of Werle (c. 1270–26 November 1317) was the daughter of Henry I, Prince of Werle, and Rikissa Birgersdotter. Rixa was a granddaughter of the Swedish jarl Birger Magnusson of Bjälbo. On 10 January 1284 she married Albert II, Duke of Brunswick-Lüneburg, founder of the Göttingen line.
She bore Albert thirteen children, among them Otto the Mild, Magnus I of Brunswick-Wolfenbüttel and Ernest I of Göttingen. Rixa died in 1317, ten months before her husband.