I am researching the Buckenham family of Debenham, and have come across James Denny through my research, though he is mentioned in regard to Eye, not Debenham.
In indexes of people named in a few Buckenham wills, I've been able to establish that James Denny, of Eye, was married to Elizabeth Buckenham, and they had a son named James also.
The Transcript says the will was dated 1737. James the son was also mentioned in a will of 1759.
By sure chance I was combing the parish register transcripts for Burgate today, and came across the burial of "Elizabeth, ye wife of James Denny", Dec 6 1722.
If you wish to know anything about the Buckenhams, I have a few generations from the wills.
Cheers,
lewis