I believe there’s been a mistake in this profile.
According to Weis' Ancestral Roots of Certain American Colonists Who Came to America before 1700, 8th Edition, the wife of Ivo Fitz Forne, Lord of Greystoke, was Agnes, daughter of Walter, which could describe her as “Agnes FitzWalter.”
But there’s no indication of “which” Walter she was the daughter of, and Walter of Gloucester did not have a daughter called Agnes.
See https://cybergata.com/roots/3941.htm
Terry Jackson (Switzer) I’ve gone ahead and detached from parents and locked relationships. The curator note is “ Curatorship taken from CS.” You may wish to add “parents unknown” or create a Walter profile as parent? I didn’t, because that really should be more researched. :)