Luitgarde of Holstein-Itzehoe
Luitgarde of Holstein-Itzehoe (c. 1251–after 1289), daughter of Count Gerhard I, married John, Duke of Brunswick-Lüneburg, in 1265 and bore five children, including his heir Otto II the Strict. After John's death in 1277 she married Prince Albert I of Anhalt-Zerbst.