The Portman family was first recorded at Taunton in the thirteenth century, and regularly represented the borough from 1302. In the 1400s they acquired an estate two miles away at Orchard, which ‘well brooks the name, for it is seated in a very fertile soil for fruit’. By the seventeenth century this property included ‘a large fair house, well befitting the possessions of the owners’.
Portman, the first of his family to sit for Somerset, was returned to the 1621 Parliament without a contest. On 15 Feb. he was appointed to attend the conference with the Lords on the proposed joint petition against recusants. He was also named that day to consider the bill on sabbath observance.
