Charity is not the daughter of Frances Vane. The Frances everyone tries to link her to was too old to have given birth to Charity. In addition, Charity was born in the New World and Frances Vane died in England.
http://genforum.genealogy.com/grubb/messages/165.html
ANCESTORS OF FRANCES GRUBB:
In his 1893 work, Gilbert Cope provides no information about John Grubb’s wife other than that her name was Frances. In December of that year, Judge Ignatius Grubb wrote that her maiden name was Vane, and that she was the daughter of Sir Henry Vane the Younger (1613 – 1662). Sir Henry Vane was a Puritan who immigrated to Boston and became the second governor of Massachusetts. After serving his term, he went back to England to participate in the Civil War and became one of the main spokespersons for Cromwell. Sir Henry Vane was executed after the restoration. The story is that Frances Vane was born in 1642, first married Edward Kewkewich of Minhincot, Cornwall and became a Quaker. After Edward’s death, she married John Grubb in Cornwall about 1675 and came to America with John. Supposedly, her money enabled John to purchase land upon their arrival.
This story is pure nonsense. In fact, the daughter of Sir Henry Vane was buried in Shipborne parish, Kent County, England on June 4, 1683. Further, if John’s wife was the daughter of Sir Henry Vane, she would have had three children after her 50th birthday!
Based on her children’s birth dates, Frances Grubb was probably born about 1660. A Frances Vane was born that year in Randolph County, Virginia. Interestingly, a John Vane, also born in Randolph County moved to Ocean Township, New Jersey where he died in 1710. Also the same year, a Samuel Vane was named in the will of Ann Hartup of New Castle County, Delaware. While none of this evidence is conclusive, it was quite common for Quakers in the older colonies to move to the Delaware Valley after Penn established his colony there.