I recommend you read the following with regard to the Magna Carta surety barons: https://magnacarta800th.com/schools/biographies/the-25-barons-of-magna-carta/
As George mentioned, many of the connections here on Wikitree that trace back to one or more of the surety barons are incorrect. Once upon a time, people were allowed to import gedcom files without sources. And people would piece together lineages based solely on someone's ancestry.com tree, again with no sources. A small group of people (through the European Aristocrats and Magna Carta projects) slowly work at trying to figure out many of these lines through the use of reliable published sources as well as ongoing research. You can view a list of recommended sources here: https://www.wikitree.com/wiki/Space:Magna_Carta_Project_Resources
If you are interested in trying to confirm your ancestry back to one of the surety barons, you might contact the Magna Carta project (link is on the web page I've given above).
Darlene - Co-Leader, European Aristocrats Project
To cut a long story a bit shorter, Audrey Barlow is a recognized gateway ancestor.
Richardson's 2011 books give her one line, which is here
and goes to Huntingfield.
No ancestry is shown here for Isabel Strange (#8) or Katherine Pabenham (#9).
The 2013 Royal Ancestry books (Vol 2 p 508 under Engaine) give Katherine Pabenham a descent from Ros and Albini, through Fauconberg, which can be followed here
But the alleged Vere/Quincy line through Isabel Strange is obviously fiddled
because it has Isabel married with 2 kids and dead when her grandfather is 42. And here
Isabel's son is born before her father.
Richardson says Isabel was allegedly the daughter of Ebles, Lord Strange. I don't know how probable that is, but it doesn't matter much because the Ebles who was a Lord wasn't Strange-523, it was the earlier one
who married Countess Alice (who wasn't anybody's mother).
The Bigod line isn't in the book, though I expect it's been given by somebody in some form. Marlyn Lewis's version is different
It's a tangle. There were threads about all this
The problem is to show that Thomas de Pabenham was the son or grandson of Margery Pecche's daughter Elizabeth.