Jacob Plemm is recorded as having married Barbara Rotin in Philadelphia in 1738. His name also appears on Bucks County land records as Plim or Plem, as well is in several variants that start with a B instead of a P.
I am trying to find out where Jacob came from and whether his family was British or German. I've found records of a George Plim or Plimm who married Francis Smith in Philadelphia in 1728, and of a William Plim who married Elizabeth Howharrow in Philaedlphia in 1739. But I can't find anything on the family as a whole.