There is no contemporary English mention of any English knight named Jehan de Mandeville, nor are the arms said to have been on the Liége tomb like any known Mandeville arms. But Dr G. F. Warner has ingeniously suggested that de Bourgogne may be a certain Johan de Bourgoyne, who was pardoned by parliament on the 20th of August 1321 for having taken part in the attack on the Despensers, but whose pardon was revoked in May 1322, the year in which "Mandeville" professes to have left England. And it should now be added that among the persons similarly pardoned _on the recommendation of the same nobleman_ was a Joh^an Mangevilayn, whose name appears closely related to that of "de Mandeville"[4]--which is merely a later form of "de Magneville."
Mangeuilain occurs in Yorkshire as early as 16 Hen. I. (_Pipe Roll Soc._, xv. 40), but is very rare, and (failing evidence of any place named Mangeville) seems to be merely a variant spelling of Magnevillain. The meaning may be simply "of Magneville," _de_ Magneville; but the family of a 14th century bishop of Nevers were called both "Mandevilain" and "de Mandevilain"--where Mandevilain seems a derivative place-name, meaning the Magneville or Mandeville district. In any case it is clear that the name "de Mandeville" might be suggested to de Bourgogne by that of his fellow-culprit Mangevilayn, and it is even possible that the two fled to England together, were in Egypt together, met again at Liége, and shared in the compilation of the _Travels_.
Whether after the appearance of the _Travels_ either de Bourgogne or "Mangevilayn" visited England is very doubtful. St Albans Abbey had a sapphire ring, and Canterbury a crystal orb, said to have been given by Mandeville; but these might have been sent from Liége, and it will appear later that the Liége physician possessed and wrote about precious stones. St Albans also had a legend that a ruined marble tomb of Mandeville (represented cross-legged and in armour, with sword and shield) once stood in the abbey; this may be true of "Mangevilayn" or it may be a mere myth.
It is a little curious that the name preceding Mangevilayn in the list of persons pardoned is "Johan le Barber." Did this suggest to de Bourgogne the _alias_ "à le Barbe," or was that only a Liége nickname? Note also that the arms on Mandeville's tomb were borne by the Tyrrells of Hertfordshire (the county in which St Albans lies); for of course the crescent on the lion's breast is only the "difference" indicating a second son.