Adelaide of Montferrat

Adelaide, called Alessia (c. 1242–1285), was a daughter of Boniface II, Marquess of Montferrat, and Margaret of Savoy. About 1263 she became the second wife of Albert I, Duke of Brunswick-Lüneburg.

Her sons Henry, Albert and William succeeded their father, and Luther became Grand Master of the Teutonic Knights in 1331. Widowed in 1279, she married Count Gerhard I of Holstein-Itzehoe and died in February 1285.