I can trace my family name (Chance) back to the Battle of Hastings in 1066. Were any records kept (do they survive?) of French nobility around or before this time? Or is it a known dead end for research?
The earliest documented person was Chauncey de Chauncey, born around 1035 in or near Canchy, Departement de la Somme, Picardie, France (that may be the name today).