Henry Burwin I Mecklenburg
Henry Burwin I was born about 1136 in Schwerin, Mecklenburg-Schwerin, Germany.

 Matilda of Saxony
Matilda of was born about 1150 in Dresden, Saxony.  She died before 1219.

 Heinrich Burwin II Mecklenburg
Heinrich Burwin II was born about 1170 in Schwerin, Mecklenburg-Schwerin, Germany.  He died on June 5th, 1226 in Schwerin, Mecklenburg-Schwerin, Germany.