Lady Joane de Sydenham (de Gothayre) - Shaky Sourced MP

Ancestral tree data are never valid without supporting historical records to validate them. The PDF I attached in Sources (31 Dec 2021) does not indicate the source nor did the website lead to where the PDF pages were found.
https://memory.loc.gov/service/gdc/scd0001/2007/20070619066sy/20070...

Doing an online search did not bring up the book from whence these page came either. I hope someone can properly source these entries to make it a legitimate Master Profile,