Volmar I Von Frohburg
Volmar I was born about 1050 in Frohburg, Germany.  He died about 1080.

 Sophie De Monbelliard
Sophie was born about 1052 in Bar-Le-Duc, Meuse, Argonne/Lorraine, France.  She died after 1105.

 Hermann Von Frohburg
Hermann was born about 1080 in Frohburg, Germany.  He died in 1125.