Magdalena von Brandenburg
Magdalena is variously described as Magdalena von Zollern, von
Nürnberg or von Brandenburg, all three of which are correct. She is
also sometimes referred to incorrectly as a Hohenzollern.
She is the descendant of Friedrich I, Graf von Zollern (+c.1125),
founder of the House of Hohenzollern. Friedrichs grandson, also Friedrich
became first Burggraf von Nürnberg through his marriage to Sofie von
Raabs, heiress of the last of the old Burggraves of Nürnberg.
He left two sons, Friedrich and Konrad.
Friedrich (1188-1251/5) continued the von Zollern and, subsequently,
von Hohenzollern line.
Konrad (+1260/1) continued the Nürnberg line and, as Magdalena
is his descendant, she is not a Hohenzollern as such.
Further down this line, Friedrich VI Burggraf von Nürnberg
(1398-1412) became Kurfürst von Brandenburg (1412-40) after Emperor
Sigismund pawned the Mark of Brandenburg to him in 1411. Unable to redeem
it, the Emperor installed Friedrich as Friedrich I, Markgraf and Kurfürst
(Elector) of Brandenburg.
Johann "der Alchemist" renounced his rights of succession as Burggraf
von Nürnberg and Kurfürst von Brandenburg and his natural son,
Fritz (Knighted around 1456), father of Magdalena, may have adopted von
Brandenburg as surname.