Julius Ernst, Duke of BRUNSWICK-DANNENBERG
He married Marie Countess of East Friesland 1 Sep 1614 . Marie Countess of East Friesland was born at of Berum, Hannover, Prussia 1 May 1582 daughter of Edzard II Count of East Friesland and Katarina Gustafsdotter Princess of Sweden .
They were the parents of 2
children:
Siegmund Heinrich, Prince of Brunswick
born 5 Jul 1615.
Marie Katharine Princess of Brunswick-Dannenburg
born 9/19 Jun 1616.
Julius Ernst, Duke of Brunswick-Dannenberg died 26 Oct 1636 at Dannenberg, Hannover, Prussia .
Marie Countess of East Friesland died 9 Jul 1616 .