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

 Princess of Denmark Helene
Princess of Denmark was born about 1176 in Roskilde, Roskilde, Denmark.  She died on November 22nd, 1233.

 Otto I "das Kind"
Otto I "das was born in 1204 in Braunschweig, Braunschweig, Germany.  He died at the age of 48 on June 9th, 1252.