The Dendy Register is a good start, but there's a lot more info available on the Dendys. Also, the Dendy Register doesn't have anything on the Winn line (which goes back to the 1500s in England) and very little on the Cargill line. In fact, the Dendy Register lists Thomas Dendy's wife as Mary (--), without a last name. She was actually the sister of John Cargill, whose daughter Clary married Thomas Dendy's younger brother William.
Anyway, if you're interested in more Dendy, Cargill, and Winn info, please email me directly.