University of Hull Royal Database (England), Author Address: @ Sybillia of Falaise. Issue of Henry I, uncertain of mother. Not
shown in The Complete Peerage, but shown by Weir as having an
unknown mother.

The cited information was published by University of Hull, Hull, UK HU6 7RX, 1994, 1995, 1996 (Ref: Sybillia of Falaise. Issue of Henry I, uncertain of mother. Not
shown in The Complete Peerage, but shown by Weir as having an
unknown mother.) The author/originator was Brian Tompsett, Dept of Computer Science.

• Source Notes

  Usually reliable but sometimes includes hypothetical lines,
  mythological figures, etc.

• References (2)
  • Parent Source: University of Hull Royal Database (England), Author Address:
  • Individual: Sibyl de Falaise