Joachim Frederick of BRANDENBURG
He married Catherine of Brandenburg-Küstrin, Princess 1570 at of Brandenburg, Germany . Catherine of Brandenburg-Küstrin, Princess was born at Brandenburg, Germany 1549 daughter of John I of Brandenburg and Katharine Princess of Brunswick-WOLFENBÜTTEL .
They were the parents of 2
children:
Anna Cathrine of Brandenburg, Queen of Denmark and Norway
born 26 Jun 1575.
Johann Siegmund Elector of Brandenburg
born 1572.
Joachim Frederick of Brandenburg died 18 Jul 1608 .
Catherine of Brandenburg-Küstrin, Princess died 1602 .