The source records Sir Nicholas Byron, knight, married to Alice, daughter of Sir John Butler of Bewsey, Lancashire; another Nicholas Byron married to a daughter of Sir John Bushe of Hingham, Lincolnshire; Sir John Byron, sans issue; Sir John Byron of Halgh, Lancashire, with wives Isabel, daughter of Peter Shelton, and Elizabeth, daughter of William Costerden, widow of [a person of] Halgh; John Byron of Clayton, Lancashire, born before marriage and heir by conveyance, married Alice, daughter of Sir Nicholas Strelley of Strelley. Their issue included Nicholas Byron, sans issue; Anthony, married Margaret Beaumont of Cole Orton, later married to Berkeley, and disinherited; John Byron, son and heir, married Margaret, daughter of Sir William Fitzwilliam; Isabel, married Skeffington of Skeffington; Elizabeth, married John Atherton of Atherton; and Mary.

The opening armorial fragment preceding the Byron pedigree is incomplete: “1st and 3rd, argent, on a bend azure between 2 cross crosslets sa. 3 bezants, all within a border of the third.” It is preserved as an unidentified associated arms fragment rather than assigned to a person.