He was a significant landowner in Taunton, and also served as a tax collector in the town.
One of his ancestors had previously served in Parliament during the reign of Edward I, and his parents owned twelve or more messuages in Taunton.
He was returned on and off eleven times in total, spanning over 40 years, gaining election for the final time in 1406, to the 6th Parliament of Henry IV.
He married Alice Crosse, and had one son, Walter Portman, who later served as the Member of Parliament for Taunton himself.
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