Johann Albrecht I Duke of MECKLENBURG-SCHWERIN
He married Anna Sofie Princess of Prussia 24 Feb 1555 at Wismar, Mecklenburg-Schwerin, Germany . Anna Sofie Princess of Prussia was born at Königsberg, Ostpreussen, Prussia 11 Jun 1527 daughter of Albrecht Duke of Prussia, Margrave of Brandenburg and Dorthea Princess of Denmark & Norway .
They were the parents of 3
children:
Albrecht, Prince of Mecklenburg
born 19 Dec 1556.
Johann V, Duke of Mecklenburg-Schwerin
born 7 Mar 1558.
Sigismund August, Prince of Mecklenburg
born 11 Nov 1561.
Johann Albrecht I Duke of Mecklenburg-Schwerin died 12 Feb 1576 at Schwerin, Mecklenburg-Schwerin, Germany .
Anna Sofie Princess of Prussia died 6 Feb 1591 at Lübz, Mecklenburg-Schwerin, Germany .