Gilbert MARSHAL , Royal Serjeant and Marshal to Henry I

  General Notes:

John was the son of Gilbert, Royal Serjeant and Marshal to Henry I, and his wife Margaret. After his father died in 1129, John inherited the title of King's Marshal.
The office of Lord Marshal, which originally related to the keeping of the King's horses, and later, the head of his household troops, was won as a hereditary title by John, passed to his eldest son and was later claimed by William.

Gilbert married Margaret before 1105.