The Henry Project: The Ancestors of King Henry II of England, An eperiment in a cooperative online database for scholarly medieval genealogy. Contributors and Editors: Stewart Baldwin, Todd Farmerie, Peter Stewart. Available at https://fasg.org/projects/henryproject/ Information from this source tagged as [Ref: HenryII .*].
Searle, Eleanor Predatory kinship and the creation of Norman power, 840-1066. Berkeley: University of California Press, c1988. NYPL JFE 88-2496. Information from this source tagged as [Ref: Searle PredatoryKinship p[0-9]*].