Thomas came from the branch of the Wintershall family which had been settled at Wintershall in Bramley since the early thirteenth century.
By attesting the parliamentary indenture for Surrey on 3 June 1433, Thomas witnessed the elections of his father for the shire and his younger brother for Guildford. On his father’s death that November, before the close of the second session, he inherited the family estates.
In November 1438 Wintershall was appointed escheator of Surrey and Sussex, only to die in office shortly before the following 27 Feb. His executors were instructed to deliver to John Bartelot* all the rolls and writs relating to the escheatorship so he could take over the task.
