Peter Grubb, Jr. (1740–1786), Patriot and second son of Peter and Martha Bates Grubb, was a second-generation member of the Grubb Family Iron Dynasty along with his older brother Curtis Grubb. They operated the Cornwall Ironworks, making significant contributions to the American Revolutionary War effort.The brothers inherited the ironworks from their father in 1754, with Peter, as the youngest, receiving only a one-third interest.