_The Mother of William the Conqueror._--Can you or any of your
correspondents say which is right? In Debrett's _Peerage_ for 1790 the
genealogy of the Marchioness Grey gives her descent from "Rollo or Fulbert,
who was chamberlain to Robert, Duke of Normandy; and of his gift had the
castle and manor of Croy in Picardy, whence his posterity assumed their
surname, afterwards written de Grey. Which Rollo had a daughter Arlotta,
mother of William the Conqueror." Now history says that the mother of the
Conqueror was Arlette or Arlotte, the daughter of a tanner at Falaise. We
know how scrupulous the Norman nobility were in their genealogical records;
and likewise that in the lapse of time mistakes are perpetuated and become
history. Can history in this instance be wrong? and if so, how did the
mistake arise? I shall feel obliged to any one who can furnish farther
information on the subject.