Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
SEGRAVE
As described in historical dictionaries
Patronymica Britannica (1860)
SEAGRAVE. SEGRAVE. A parish in Leicestershire. The baronial De Segraves had possession of the lordship 12. Henry II. Baronage.