Heinrich Von Mecklenburg
Heinrich was born in 1234 in Werle, Mecklenburg Schwerin, Sachsen, Germany.  He died at the age of 57 on October 8th, 1291 in Gustrow, Mecklenburg Schwerin, Sachsen, Germany.

 Richiza Birgersdotter
Richiza was born in 1234 in Bjälbo, Ostergotland, Sweden.  She died at the age of 54 on December 13th, 1288 in Gustrow, Mecklenburg Schwerin, Sachsen, Germany.

 Nicholas Von Mecklenburg
Nicholas was born in 1264 in Gustrow, Mecklenburg Schwerin, Sachsen, Germany.

 Heinrich Von Mecklenburg
Heinrich was born in 1266 in Gustrow, Mecklenburg Schwerin, Sachsen, Germany.

 Richenza Von Mecklenburg
Richenza was born in 1268 in Gustrow, Mecklenburg Schwerin, Sachsen, Germany.  She died at the age of 45 in 1313 in Gottingen, Hannover, Prussia.

 Johann Von Mecklenburg
Johann was born in 1274 in Gustrow, Mecklenburg Schwerin, Sachsen, Germany.  He died at the age of 63 on August 27th, 1337 in Gustrow, Mecklenburg Schwerin, Sachsen, Germany.