William III "The Great
William III "The was born about 0969 in Poitou, France.

 Agnes Of Burgundy
Agnes Of was born about 0995 in Bourgogne, , France.  She died on November 10th, 1068.

 Count Of Poitou Peter
Count Of Poitou was born about 1023.  He died in 1058.

 Agnes Of Poitou
Agnes Of was born about 1024.  She died on December 14th, 1077.

 IV Guillaume
IV was born about 1024 in Aquitaine, France.  He died on September 26th, 1086.