• General Notes

  Came to England from Perci, Normandy 1067; died during the siege of Jerusalem in the first crusade.
  
  There is dispute about which of several Percis in Normandy was his home: Loyd, quoting The Complete Peerage, says it was Percy-en-Auge, between Caen and Lisieux in Calvados.

Details of William's family with Emma de Port