Johann I Mecklenburg
Johann I was born in Lippe-Detmold, Germany.  He died on August 1st, 1264 in Schwerin, Germany.

 Luitgard Henneberg
Luitgard was born about 1211 in Henneberg, Ostpreussen, Prussia.  She died before June 14th, 1267 in Schwerin, Germany.

 Heinrich I zu Mecklenburg
Heinrich I zu was born about 1230 in Schwerin, Germany.  He died in Schwerin, Germany.  He was buried in 1302 in Doberan, Mecklenburg-Schwerin, Germany.

 Elisabeth Mecklenburg
Elisabeth was born about 1231 in Schwerin, Mecklenburg-Schwerin, Germany.  She died in Holstein, Prussia.