Hallo.We are at least related. My great grandfather James b.1825, married at Barkway, emigrated with family in 1852. He like his father was a thatcher at Barkway. Earlier line outline only : Henry Bunnion/Bunyon b.4.4.1661 (b.Gt Hormead)m.Elizabeth Scrubie (Scrubies a Cambridgeshire family,across the border) - John Bunnion 27.12.1698 (b.Wyddial)- Robert Bunnion (b.Wallington)6.8.1732 - Robert Bunyan 23.9.1759 (b.Barkway). However, a cousin who traced the line did make one or perhaps two guesses.I'd like to go back when I have time to check carefully. Fortunately, records of the Barkway/Reed/Barley/Great Hormead &c family are fairly extensive. (The late Dr John Bunyan, a Harley St specialist, was descended from the same Barkway family.)
Re that Henry Bunyon - if born at Wyddial or Buckland, no records are available. All the Henrys for whom there are records lived in Chalgrave (where the earliest spelling,Bunyan, is found), not far from Dunstable, and so are almost certainly linked with the Bunyans who moved south there in c.12th century. I have more details on the three Chalgrave Henry Bunyans, the earliest one was born in 1598.
There is reference to a Henry Buignon and a John Buingnon in the 1219 Assize Roll of Bedfordshire,and Henry Bunyan in the Dunstable Chronicle of that year.
Ralph Buignon of the Dunstable branch was hanged in 1219 for murdering a cleric!
The Chronicle has three references to a John Boynon (at Pulloxhille-where the Bunyans probably first came to) - 1257 and 1286, the year of his death : he is said to have a been a freeman of Almaric St Amand, holding some 220 acres on condition of furnishing service for "half a knight".
According to Jn Brown, some of the Bunyans moved south in the direction of Chalgrave and Dunstable and some north in the direction of Elstow. Distances are not great. It is possible our own family may be descended from either. Hope to do more work on this.(Regarding the great author, I do not know of anyone descended from him BEARING the name Bunyan but someone may have more information now.)
The Buckinghamshire Bunyans are descended from Henry Bunyan born 23.13.1604 at Chalgrave and buried at Moulsoe.
ALL come from the original Norman family from which the famous author is also descended (see John Brown's major work on him which has interesting details on the author's ancestors). Details of the origin of the name Buignon are readily available - orig.probably Old French bugne = a blain/blane- an ordinary bun and bunnion are related.
Hope to explore more - eg other descendants of the original family that settled in the Pulloxhille area (there is information available) and eg whether more info can be found re ancestors of Frances Bunyon (Norfolk family) who married the Revd John Colenso, later Bishop of Natal (one of my heroes!).
Any information from others on any of these matters is very welcome.
(The Revd Dr) John Bunyan PO Box N109, Campbelltown North, NSW 2560, Australia