Since the 13th century the Giffards had been settled at Whaddon, where they were hereditary custodians of the park and chase. John inherited the manor on the death of his father, Robert, which occurred some time after 1387;
Aspects of Giffard’s career suggest that he was a lawyer. Certainly, his closest associates were members of the legal profession, like John Barton II, apprentice-at-law, for whom he acted in 1412 as a trustee of a manor in Padbury. Along with Barton and several lawyers from Essex, he served as a feoffee of the Buckinghamshire manor of Wroughton-on-the-Green, on behalf of Richard Fox—he and his fellows acting as patrons of the rectory there in 1420; and four years later he was a witness to the deed by which Fox and others, as appointees of Walter, 5th Lord Fitzwalter, conveyed to Barton the manor of Dinton. In the course of the 1420s, Giffard also acted as a feoffee-to-uses for John Linford, but failure to obtain the necessary royal licence for transactions regarding Linford’s property meant that he and his associates had to sue for pardon. Giffard is recorded as present at several parliamentary elections held in Buckinghamshire—those of May and December 1421, 1422, 1427, 1432 and 1433—and he was listed along with his sons, Thomas and John, among the notables of the shire required in 1434 to take the generally administered oath against the maintenance of malefactors.
In 1415 Giffard had increased his landed holdings in Buckinghamshire with the acquisition of the manor of Tattenhoe. This he had placed in the possession of trustees (who included John Barton II and Thomas Thirleby, now parson of Shenley), until in 1431 it was settled on him and his wife Elizabeth for their lives, with remainder in tail-male to their younger son, John. Giffard died at an unknown date before November 1437, when courts were held at Tattenhoe in the name of Elizabeth alone. According to a deposition made in Chancery in 1445 by William Edy, a trustee of Giffard’s more important manor at Whaddon, Giffard had been so heavily in debt towards the end of his life that the sale of his moveable goods would not suffice to pay off his creditors. His elder son, Thomas, had died leaving only a daughter, and, because ‘he loved better John, his younger son, than he did the issue of Thomas’, after making a thorough search among his evidences to ensure that Whaddon was held in fee simple, he had put the manor in the hands of Thomas Wydeville and others, including Edy, authorizing them to settle his debts after his death and then transfer the estate to John junior. In the event, the trustees had decided to accept the younger John’s undertaking to satisfy his father’s creditors himself, and had conveyed the property to him and his wife jointly. Naturally enough, their action was contested by Thomas Giffard’s daughter and heir, Alice, wife of Gilbert Standish; but in the end she had to be content with Tattenhoe instead of Whaddon.
