He [Walter de Coleville] married Isabel or Elizabeth (e). He died 1277, before 2 September, when the writ for his Ing. p. m. is dated. [Complete Peerage III:374, (transcribed by Dave Utzinger)]
(e) Aubourn, Counthorpe, and other of his manors, co. Lincoln, were committed, 25 Oct 1265, to Isabel late (sic) the wife of Walter de Coleville; where also, 20 Feb 1265/6, is a grant of lands in Aubourn to Elizabeth, wife of Walter de Colveville, the King's enemy who is in prison. Elizabeth and Isabel are her merely different forms of the same name, and the word "late" in the first passage is an error. V.G.
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Most people have Isabel born in Muston, Lancashire. Unfortunately I find no record of a Muston in that county. There is a Muston in Leicestershire & East Ride Yorkshire. Of these I believe that the Muston in Leicestershire is closest, although it is near Nottingham, not Lancashire.