Pierre I de Grandison
Pierre I was born about 1190 in Neuchatel, Switzerland.

 Agnes de Neuchatel
Agnes was born about 1194 in Neuchatel, Switzerland.  She died after 1244.

 Amedee de Grandeson
Amedee was born in 1229.

 William de Grandeson
William was born in Cassington, Oxfordshire, England or near Lake Neufchatel,Switzerland.  He died on June 27th, 1335 in Gascony, France.