There is Ø evidence for Peter having married an wife of Peter ‘le Clerc’ . I think that profile should be detached and replaced with wife of Peter "le Clerc" (unknown).
It's worth noting that Wikitree manager Jack Day isolates Peter ‘le Clerc’, de Thornton from parentage for what he considers a lack of evidence. He's not convinced that Sir David "le Belward" ap William ap Dafydd, Knight, de Malpas and Catherine verch Owain were his parents—perhaps that only hypothetical rationales connect him to familial relationships apart from known children.
Peter "Peter le Clerc" Thornton formerly Malpas
Son of [father unknown] and [mother unknown]
[spouse%28s%29 unknown]
Jack Day's further explains:—
"Was Peter the son of David le Clerk?
"The Visitation shows David (Malpas-165) as Peter's father, and David in turn the son of William Belward,[16] and was also known as Dan David de Mallpas Clericus.[18]
Tait was sceptical of Peter being the son of David le Clerc of Malpas, stating the relationship was inferred from the name le Clerc and invalidated because le Clerc was Peter's official title.[1]
"However, according to Ormerod: the 1768 edition of Collins Peerage (Vol IV:211) states Peter was a younger son of David Le Clerc lord of a moiety of Malpas citing the Egerton Pedigree as his authority; other Cheshire pedigrees (Harl. MSS. 2119 and 2038) agree; and an original charter (No XXXIII) in Booth's collections confirmed the relationship.[9]
"Two factors make it difficult to maintain the connection between David and Peter le clerk: First, no documentation has been found linking the two persons; and second, as efforts are made to date the lives of both David and Peter, it increasingly appears that they are contemporaries, rather than father and son.
"Ormerod states that Peter was a younger son of David Le Clerc, lord of a moiety of the Barony of Malpas, citing Collins, on the authority of the Egerton pedigree and noting that one copy of Booth's pedigrees cites an original charter then in the possesion of Booth, and numbered XXXIII in his collections.[9]"