Sir Thomas Grey, VII, of Horton, Kt.

From https://en.wikipedia.org/wiki/Isabel_of_Cambridge,_Countess_of_Essex

In 1412, at three years of age, Isabel was betrothed to Sir Thomas Grey (1404 – d. before 1426), son and heir of Sir Thomas Grey (c.1385-1415) of Heaton in Norham, Northumberland, and his wife, Alice Neville, the daughter of Ralph Neville, 1st Earl of Westmorland. They had one son.[4] The elder Sir Thomas Grey was an associate of Isabel's father who also lost his life in the Southampton Plot.

She married secondly, before 25 April 1426, the marriage being later validated by papal dispensation, Henry Bourchier, 1st Earl of Essex, by whom she had seven sons and one daughter:[5]

• 4. Burke's Peerage & Baronetage, 106th Edition, Charles Mosley Editor-in-Chief, 1999 Page: 15, 1222
• 5. Richardson IV 2011, pp. 401–3.