Anne Le Strange, Baroness of ...married one "John Denham" -- not Roger le Strange of Hunstanton
I understand there were connections between the Lestranges and the Heydons. But this one is invalid, imho.
Someone uploaded a testimony (properly sourced and cited, on Wikitree) of one Roger Le Strange of an earlier generation, which indicates Heydon connections. I just think that it is easy to become confused with the old records, and sometimes we are too hasty to 'fill-in' the Tree with whatever seems right at the moment.
https://www.wikitree.com/photo/png/Le_Strange-110
{Testamenta vetusta: being illustrations from wills, of manners, customs, &c. as well as of the descents and possessions of many distinguished families. From the reign of Henry the Second to the accession of Queen Elizabeth" by Nicholas Harris Nicolas (page 468 of Volume II)
https://babel.hathitrust.org/cgi/pt?id=mdp.39015011273334&view=...
https://catalog.hathitrust.org/Record/000817706
Beyond all that, my visitations source for the pedigree chart only gives Anne Heydon's husbands name ("John Denham") and nothing more.
But a correct name with a certain degree of confidence is better than nothing, in my book. And there is absolutely nothing to prove that this Anne Heydon married this Roger Vaux le Strange. In fact, disregarding Tudorplace, Stirnet supports the information given in the Wikitree source linked above from the testimonial of the elder Roger Lestrange.
So I'm convinced that this Anne Heydon married someone named John Denham, and no other.