Mary was the daughter of unknown parents. The date and place of her birth have not been found.
She had two marriages/partners. Her first husband was John Shelley. They were married, but the date and place have not been found. They had no known children.
Her second husband was sir John Guildford. They were married, but the date and place have not been found. They had no known children.
Note 1
daughter of Sir William Fitzwilliam of Milton, Northamptonshire