Several sources are given by Becky Thill on her website: http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=ttg13&id=I3151

These sources establish the parentage of Charles, that he married Sydney Chew, daughter of William and Sidney (Wynne) Chew, and that they had several children, including Francis.

From Colonial Families of the United States of America, Vol. III:

Henry Pierpont immigrated to Maryland in 1665, settled in Anne Arundel Co., and was a member of the Society of Friends. He was the author of a book on Truth. His son, Charles, m. Sidney Chew, the dau. of William and Sidney (Wynne) Chew. A granddau., Mary Pierpont, m. 1762, Richard Richardson, Jr., [a grandson of William Richardson, Sr. and Elizabeth Ewen.]