STEPHEN, son of Jordan of Sheppey (de Scapeia), by Cicely his wife (c), held, by grant of Richard I and confirmation of John, the manor of Northwood, in Milton. He married, 1stly, Fedive, widow of John, son of Gilbert DE LANDRIES, from whom she had dower in Surrey. She was living 1213-14. He married, 2ndly, Joan (----), and died shortly before 21 April 1231. [CP 9:753]
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(c) Cicely gave to the church of Rochester a window to the altar of St. Peter, etc., and, with consent of her sons William and Stephen, confirmed a rent of 12d. given by her father Wimar. She was living in 1198, when assessed to the tallage of the vill of Milton (next Sittingbourne) 40 marks; Stephen her son, 5 marks; William his brother, 10 marks.
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Based on note (c), CP concludes that Stephen was probably a younger brother to William.