Joachim Friedrich Elector of BRANDENBURG
He married Katharine Electress of Brandenburg 8 Jan 1570 at Küstrin, Brandenburg, Prussia . Katharine Electress of Brandenburg was born at Küstrin, Brandenburg, Prussia 10 Aug 1549 daughter of Johann I Margrave of Brandenburg-KÜSTRIN and Katharine Princess of Brunswick-WOLFENBÜTTEL .
They were the parents of 11
children:
Johann Siegmund Elector of Brandenburg
born 8 Nov 1572.
Anna Cathrine Queen of Denmark & Norway, Princess of Brandenburg
born 26 Jun 1575.
Daughter Margravine of Brandenburg
born 1576.
Johann Georg Margrave of Brandenburg-JÄGERNDORF
born 16 Dec 1577.
August Margrave of Brandenburg
born 16 Feb 1580.
Albrecht Friedrich Margrave of Brandenburg
born 19 Apr 1582.
Joachim Margrave of Brandenburg, Twin
born 13 Apr 1583.
Ernst Margrave of Brandenburg, Twin
born 13 Apr 1583.
Barbara Sofie Princess of Brandenburg, Duchess of WÜRTTEMBERG
born 16 Nov 1584.
Daughter Margravine of Brandenburg
born 1585/86.
Christian Wilhelm Margrave of Brandenburg
Joachim Friedrich Elector of Brandenburg died 18 Jul 1608 at By Köpenick, Berlin, Brandenburg, Prussia .
Katharine Electress of Brandenburg died at Cölln an der Spree, Berlin, Brandenburg, Prussia .