Pierre I Sire de Grandson
Pierre I Sire was born in 1190 in Neuchatel, Switzerland.  He died after 1263.

 Agnes de Neuchatel
Agnes was born about 1220 in Neuchatel, Switzerland.

 William de Grandison , Sir
William was born in 1263 in Cassington, Oxfordshire, England.  He died at the age of 72 on June 27th, 1335 in Gascony, France.