Walter Penwell was born on 1 Dec 1649 in Saco, York County, Province of Maine, Massachusetts. He was appointed road surveyor in 1682.  He died before Aug 1730, Savage says after 1719. He was a weaver. He was also known as Walter Pennell and Walter Penuel.

He removed to Cape Porpoise before his father's death, and was presented before the grand jury, receiving severe punishment. In 1681 he was again complained of by Lieut. Purington, as appears by the following presentment: "We present Walter Penwell Jr. for marking Mr. Watts his horse, as I apprehend to appropriate to himself, and upon his reproof for so doing sayd Penwell sayd Devil take him, and turned him agoing." After his father's death he returned to Saco, and as an inhabitant of that town, in 1682, he received fifteen stripes for killing the cow of Joseph Bowls, of Wells. He subsequently moved to York, where he was living in 1722, at the age of 74 as he stated in an affidavit.

from "Saco Valley", p. 1105