I have resolved the two Clement Oakeys of Haddenham.
Clement and Ann Oakey were my great x5 grandparents ... so I too had to figure out WHICH of the two Clement Oakeys it was who married Ann.
If we assume that the records of age at death are correct, then the first to be born was the first to die. And Ann died BETWEEN the two of them.
So I ordered Ann's death certificate, to see what it said.
I have it here in front of me as I type.
When and where died: Thirtieth of October 1839, Haddenham.
Name and Surname: Ann Okey
Sex: female
Age: 74 years.
Occupation: Wife of Clement Okey Shoemaker.
Cause of death: Inflammation of the Bowels
Informant: Sarah Bedford, present at the death. Chatteris
When registered: Thirty First of October 1839
So ... if she was the wife of Clement Okey when she died (and not a widow), the Clement Okey who married Ann was clearly the SECOND of the two to be born.
I have identified the following earlier generations:
Clement Okey's parents: John Okey and Ann Okey (nee Pake)
Ann Pake's parents: William Pake and Mary Pake [nee Okey]
Mary Okey's parents: John Okey and Elizabeth Okey (nee Negus)
Elizabeth Negus' parents: John Negoose and Ursula Negoose (nee Luckett)
Ursula Luckett's parents: William Luckett and Anne Luckett (nee Bush)
Anne Bush's parents: Willyam Bush and Alse Bush (nee Pegge)
Willyam Bush's father might have been William Bush (he is the only plausible candidate among the recorded burials in Madingley)
William Bush the elder's father might have been Anthony Bush (same reasoning)
I hope this helps.
Also - a generic question to anybody else who is descended from this Oakey line. My maternal grandmother was born an Oakey. She, and my mother, and I all have webbed toes - our second and third toes on each foot are joined all the way to the first joint. Does anybody else who shares this Oakey ancestry have a similar feature??