Hi jbml,
Thanks for your reply. I have seen the Wiles you mentioned in Great Staughton but I think they are the ones who were in records earlier as Wild. There are census records for a William Wiles (ag lab) residing in Great Staughton born in Sharnbrook (one census has London), and there is a baptism record for a William Wild born in Sharnbrook in 1792 to John and Mary Wild, who might be the same one.
The Wiles I'm looking for would be grandchildren of Thomas Wiles (of Eaton Socon) and his wife Mary Maxey, who had two sons, Thomas and William who I think are the ones bpt. in Southoe in 1759 and 60 (in FreeREG). I believe they are the ones married in Ravensden in 1781 and 86. But I've found no baptism records for any of their children except Mary (to William and Mary) in 1788 in Ravensden. Other evidence suggests they later lived at St Neots. Baptism records for that period at St Neots do not seem to be available through the commercial databases (FamilySearch, FindMyPast, Ancestry) and are not indexed in FreeREG.
I did find the will of Thomas Wiles, Gentleman of Eaton Socon (1817), which mentions all his seven children but no names of grandchildren. Three of the daughters have marriage records at St Neots, but no baptism records of children, except for a daughter who had children bpt. at Potton. One of his daughters married the vicar of St Neots, Thomas Thorns, so I suspect he may have baptised his nieces and nephews there but I find no records.
So I'm hoping someone has access to the register for St Neots St Mary's where any other children might be found. I suspect one of these male children of Thomas or William is my direct ancestor.