Adam de Montbegon, Married One of the Daughters and Co-Heiresses of Adam FitzSwain, Book ‘Final Concords of Lancaster’, Page 51, Footnote 1
Narrative
https://www.familysearch.org/photos/artifacts/155339401?p=48086827&returnLabel=Adam%20de%20Montbegon%20(G8VP-6TG)&returnUrl=https%3A%2F%2Fwww.familysearch.org%2Ftree%2Fperson%2Fmemories%2FG8VP-6TG