Sir Roger de Carminow, "Crusader" - Who Was Joanna, Wife of Roger Carminow?

Here we have the wife of Roger Carminow as Joanna Dinham, which leads to an illustrious ancestry. But there is no documentation that I can find.

Stirnet lists her as "Joan(Dinham?)", but provides no source material other than to say:
"In 1874 The Hareleian Society published its compilation of the records produced in the Visitation of Heralds made to Cornwall in 1620. It included an appendix providing a 'Comparative Pedigree' for this family, identified as being necessary because of errors in the Visitation."

Our Royal, Titled, etc, does list her as Joanna Dinham, but provides no source material, although they do list sources for both Sir John and and his father Roger: https://our-royal-titled-noble-and-commoner-ancestors.com/p1617.htm....

The Visitation of Cornwall has her, but with no last name or ancestry: https://play.google.com/books/reader?id=t0U7AQAAIAAJ&pg=GBS.PA72.

Likewise, she is shown as Johanna, no last name, but remarried to a John Arundell, in Parochial and and Family History of the Parishes of St. Teath and Temple in the County of Cornwall: https://archive.org/details/parochialfamilyh00macl/page/n87/mode/1u....

In short, I find nothing that justifes keeping Joanna Dinham as the wife of Sir Roger. If you have any sources for this, please chime in.