Douglas Richardson, in s.g.m., writes:
Maud de Lucy, wife of Nicholas de Segrave, is identified as a Lucy in an old Segrave family pedigree, presumably the one Hap refers to in the
Chaucombe Priory. Unfortunately, her parentage is not stated in the document. However, since the rest of the pedigree appears to be sound, there is no
reason to suppose that she was not in fact a Lucy as claimed. She was evidently the daughter of Geoffrey de Lucy, a male line descendant of Richard
de Lucy the Justiciar. There is some evidence to support a Lucy connection. As I recall, Maud's eldest son went on a Crusade with one of the many
Geoffrey de Lucy's. Also, I've discovered that Maud's younger son held property in Essex under a Lucy family that descends from Robert de Lucy,
brother of the Justiciar. My guess is that this property was probably Maud's maritagium and that she settled it on her younger son. Just how the Essex
property was subinfeuded to the junior branch of the family, I have no idea. [...]
Sources:
Vineland Historical Magazine, Volume XXXV-1950, 1 and 4, January-April
soc.genealogy.medieval