HYA Paul, if you are cousin of Steven DAVY (Father ALbert DAvy) FROM NZ I can provide the link as i finished the family history for the kids this year on their fathers side.
Edmund Davy of Varfell married his long term mistress Joan Blake; their youngest son Robert Davy 1663-1738 had Robert bapt 1683 married Elizabeth Ware; they had Robert born 1709; he had Robert born 1738 he went to Wales to seek his fortune I had him as far as living at Gnoll, as a mining engineer, he married Mary Edwards whose mother was a Leyson/ Leyshon, as family which descend fro the 6th century ( detail will be coming); they had Jonathan Davy born 1760; he had Capt Leyson Davy; then Charles; Harold Charles who had Albert Lenard Davy and others etc etc.... so to simplify if you are the Paul Davy related to Steven Davy (cousin) Jonathon Davy (Captain Leysons father) was Sir Humphrey's Uncle.
Have the whole family history including heaps of photos and detail (about 70 pages worth). If you wish a copy am happy to send it. If you still are at this email address as 11 years old the posting!!!!!