Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
PHILIBERT
As described in historical dictionaries
Patronymica Britannica (1860)
SAINT PHILIBERT. Four parishes in Normandy bear , the name of this Norman saint, but I am not aware that it is known from which of tliem the great Anglo-Norman baronial family sprang.