Hopton book
https://books.google.com/books?id=Y0hkh_WD01oC
The story goes that the Swillingtons of Swillington (near Leeds) descended to an under-age heir, whose Wicked Uncle became his guardian. The clever lawyers were called in, and the estate then stayed with the descendants of WU and never got back to the rightful owners. (This is why so many lawyers got so rich in that era.)
And if the legitimate descendants ran out, as happened, the estate was to go to the illegitimate branch. WU had a bastard son Thomas by Joan Hopton of Armley. She never married the father and was never called Swillington.
The Hoptons of Armley (in Leeds) weren't related to the Hopton Castle bunch in Shropshire. There's a pedigree, but Joan got airbrushed out and replaced by a bogus improvement.
WU's legit son Sir Roger married Joan Scrope, and Sir Roger's bastard half-brother Thomas married Joan's daughter, Margaret Pert.
William Pert is a mystery. He's supposed to be of Terrington, but the VCH page on Terrington parish knows nothing about any Perts. No idea where the name comes from or whether it ever had a "de", but "de" was going out of fashion by then anyway.
Thomas was sometimes called Swillington before he settled on Hopton. He wasn't called Westwood and presumably wasn't born there. It was part of the Swillington estate, but Thomas didn't live long enough to come into it.
No idea why it says he was married at Nettlestead - it was his grandson who married a Wentworth.
Margaret wasn't called Westwood and wasn't a Lady.
Their son John was never knighted and never called anything but Hopton. He did come into the estate, when the legit line fizzled out, and took up residence at Westwood.
Royal Ancestry vol 3 p. 313. Descendants include Peyton, Isham, Mauleverer, Saltonstall.