Wilhelm
Wilhelm was born on April 11th, 1184 in Winchester, Hampshire, England.  He died at the age of 29 on December 13th, 1213 in Winchester, Hampshire, England.

 Helene
Helene was born in 1186 in Denmark.  She died at the age of 47 on November 22nd, 1233.

 Otto
Otto was born about 1204 in Braunschweig, Brunswick, Germany.  He died on June 9th, 1252 in Braunschweig, Brunswick, Germany.