Since writing in 2007, I have got a little further back with my Pembertons. The furthest back I've got is a Jeremy (Jeremiah) Pemberton bapt 1746 in Rostherne, Cheshire. I think his parents were Joseph Pemberton and Phebe Hall who married in December 1745.
Someone told me all Pembertons came from Lancashire and got very annoyed when I said I couldn't find any connection with my Pembertons and any from Lancashire around the same period (mid 1700s). Perhaps I was correct in that the original Pembertons were from Cheshire, if there is a George Pemberton born about 1660 in Cheshire and as well as someone going to US, others went into Lancashire for work, rather than coming from Lancashire to Cheshire.
JacksonOfGeorge - I have the wills of Jeremy Pemberton 1799, Peter Pemberton 1860 and his wife Elizabeth 1869 if you would like me to send you the transcriptions.
Maybe you know that a couple of other Pembertons went to USA in 1870s. Samuel who was born in Kingsley, Frodsham in 1847 and his brother William born 1854 in Kingsley, Frodsham, Cheshire.
Lizzie
Lizzie