I'm not familiar with Mr. Remfry or his work. I can say my fellow historians often make terrible genealogists. So I always hold my breath when I read what a historian has written in context of family history.
Having said that, Mr. Remfry's article has several problems. He makes a variety of statements, many of which can be shown to be false or likely wrong.
In order to buttress one of his theories, for instance, he renders the Latin phrase "cl. mem." [i.e., clare memorie] as the given name "Clementia."
That's just plain weird.
If I was editing his article, I would have ripped out several sections and replaced them with factual and logic based deductions. Unfortunately I was not his editor.
Among other things, I note that Mr. Remfry advances the theory that the mother of King John's illegitimate daughter, Joan, was Clemence de Fougères [died 1252], wife successively of Alain de Vitré (or Dinan) (died 1198), seigneur of Dinan, and Ranulph, Earl of Chester (died 1232), and daughter of Guillaume de Fougères, seigneur of Fougères.
He states at one point: "There can be little doubt that the Queen Clementia of Wales who died in 1252 was the same woman who was wife to Earl Ranulf and Alan Dinan and mother of Princess Joan of Wales (d.1237)." END OF QUOTE.
However, there was never a woman such as Queen Clementia of Wales and certainly none that died in 1252! At best Mr. Remfry is guessing that Joan's mother was Clemence de Fougères. I currently consider Joan's mother's identity unproven.
Elsewhere Mr. Renfry states without any documentation that Clemence de Fougères died 26 December 1252. It is certain that this lady was living on 29 April 1251, when William de Ferrers, Earl of Derby, was granted respite the demand for 20 marks, at which he was amerced in an assize of darrein presentment lately taken between him and Clemence, Countess of Chester, concerning the advowson of Hartington, Derbyshire [Reference: Henry III Fine Rolls Project, 35/505 (available at www.finerollshenry3.org.uk/content/calendar/roll_033.html)].
The following four records prove, however, that Clemence, Countess of Chester, died testate shortly before 6 August 1252. As such, she was already cold and long in her grave on 26 December 1252.
(1) On 6 August 1252 the king gave mandate to the queen and Richard, Earl of Cornwall, "so soon as a partition has been made amongst the parceners of the lands late of Clemence, countess of Chester, of the lands which fall to Henry de Hastinges, who is in the king's ward ward, to cause to be assigned to William de Sancto Ermino, king’s knight, £40 yearly of land ..." [Reference: Calendar of the Patent Rolls, 1247–1258 (1908): 220].
(2) On 27 August 1252 the king ordered his escheator in Nottinghamshire to take into the king’s hand all lands formerly of Clemence, countess of Chester in his bailiwick and to keep them safely until the king orders otherwise [Reference: Henry III Fine Rolls Project, 36/1031 (available at www.finerollshenry3.org.uk/content/calendar/roll_033.html)].
(3) On 29 August 1252 the king mandated that the Abbot of Pershore, the king's escheator, take sufficient security from the executors of the will of the late Clemence, Countess of Derby, for the payment of debts. [Reference: Cal. of Close Rolls 1251–1253 (1927): 151].
(4) On 27 Nov. 1252 the king appointed Baldwin de Paunton and Walter de Bereford to extend the manor of Repindon [Repton], Derbyshire, with all other lands which she held in dower of the inheritance of Randolf, Earl of Chester [Reference: Reference: Calendar of the Patent Rolls, 1247–1258 (1908): 224].
If Mr. Remfry is unable to get his basic historical facts correct, then his genealogical assumptions are necessarily all thrown into serious doubt.
If he was my student, I'd give him a D on his paper and tell him to go back and research it better and revise it extensively.
Best always, Douglas Richardson, Salt Lake City, Utah