Clyde, Have sent you a e-mail. Putting this information here for other researchers.
(1) Seymour/Seymore Summersett/Somersett born est. abt 1700 and died (Jan) 1753. Wife's name unknown.
Children: John, Seymour, Elizabeth, Easter.
(Documentation: Seymour Summersett's Will in Northampton Co., NC.)
(2) Seymour Summersett born est abt 1730 and died after 1776. Wife's name unknown.
Known Children: William, Lewis, Joseph
(Documentation: Land deeds 1786 Northampton Co., NC)
(3) William Summersett born est abt 1753-1765, died 1789-1790 Bladen Co., NC. Wife's name Frances (last Sheriff not documented).
Children: John, Seymour, Stafford and three daughters. Documentation, William's estate settlement in Columbus Co., NC.
Allen Summersett may be son of William, for a Allen Summersett changed his name to Allen Barefield. And Allen Barefield received share of William's estate settlement.