Henri III De+ Limbourg
Henri III De+ was born before 1145.

 Sophie Von+ Saarbrucken
Sophie Von+ was born about 1155.

 Valeran IV De+ Limbourg
Valeran IV De+ was born in 1175.  He died at the age of 51 on July 2nd, 1226.

 Isabelle De+ Limbourg
Isabelle De+ was born about 1180.  She died in 1221.

 Frederic De Limbourg
Frederic De was born about 1190.  Frederic De is no longer alive.