On 10 January 1284 Albert married Rixa, daughter of
Henry I, Prince of Werle and Mecklenburg-Güstrow, and
Rikissa Birgersdotter. They had four daughters and nine sons. Three of the sons, Bruno, Wilhelm and Johann, died young. The children who reached adulthood were: • Adelaide (1290–1311), married
John, Landgrave of Lower Hesse •
Richenza, Abbess of Gandersheim (1298 – 26 April 1317) • Mechtild (1293 – 1 June 1356) • Jutta (1309–1332) •
Otto the Mild, Prince of Wolfenbüttel (24 June 1292 – 30 August 1344) • Luder or Lothar, joined the
Teutonic Order •
Albert, Bishop of Halberstadt (died 1358) •
Henry, Bishop of Hildesheim (died 1362) •
Magnus I, Prince of Wolfenbüttel (died 1369) •
Ernest I, Prince of Gettingen (died 1367) ==References==