In reviewing the past few days of activity on the topic of Folwell to Falwell, I read that you had learned of Folwells from Pennsylvania. Since I first posted my message about the "missing" Folwell children, I have since learned more about the line in question.
Maria Folwell (b.1837, Crawford Co. PA)
George Folwell (b.1844, Crawford Co. PA)
Rosetta Folwell (b.1856, Crawford Co. PA)
Isaac Folwell (b.1811, d. 1876 Venango Co. PA; m. Emeline Emerson) - 5 siblings
John Folwell (b.1779, Montgomery Co. PA; m. Nancy Shellmeir) - 9 siblings
Joseph Folwell (b.1748, d.1824 Montgomery Co. PA m. Ann Boileau)
William Folwell (b.1704, d.1776; m. Ann Potts) - 6 siblings
Nathan Folwell (b.1673, d.1731; m. Sarah Lippincott)
I am still searching for information on the "missing" three Folwells listed at the top of this message.