Hello Smouse,
I came across this post when I was searching surname interests.
By now, you have probably found what you were looking for, but I thought I'd reply anyway!
Our John Kettlewell (bap 2 8. 1766 at Whixley) was married to Elizabeth Potter, and was the father of James (and many others), all born in Whixley.
I have John's death as Whixley, 29 March 1829, aged 63.
James Kettlewell moved to Barmby Moor some time before 1830.
I do have the transcript of Whixley Parish Registers 1586 to 1812, if I can be of any help.
Best wishes,
Yorkslass