von Blanckenburg
Uckermark · Pomerania · Mecklenburg
Arms: Johann Siebmacher, Wappenbuch Nürnberg 1605, Tafel 172, Wikimedia Commons, gemeinfrei
Ernst Ludwig's second marriage, childless. Luise and Pauline were sisters, daughters of Henning Dionysius Ludwig von Blanckenburg (1764–1813) – two Blanckenburg sisters married two Gerlach brothers.
An old noble family of the Mark, attested in Mecklenburg since 1173 and in Pomerania since 1253 (Anselm von Blankenborch). Their nephew Moritz von Blanckenburg (1815–1888), lord of Zimmerhausen, a childhood friend of Bismarck's and a conservative parliamentary leader, was thus a nephew of Ernst Ludwig's. The double connection – two sisters marrying two brothers – makes this alliance especially close.
Sources: Degener Verlag, Deutsches Familienarchiv vol. 160 »von Gerlach – Lebensbilder einer Familie« (in German); Wikipedia articles on the families named; Wikimedia Commons (coat-of-arms images). Given to the best of our knowledge. Jürgen von Gerlach: von Gerlach. Lebensbilder einer Familie in sechs Jahrhunderten (Deutsches Familienarchiv 160), Insingen 2015 (in German). All sources. For corrections or additions, please contact the family administration.