A quick bit to start you off/confuse you further....
Jonathan Ewers did indeed marry Elizabeth Blake, but this is not the same Jonathan Ewers who was born in 1816 to Edward and Elizabeth
baptism: 10 Mar 1816 Jonathan Stephen son of Edward and Elizabeth Yewars (Ewers) of Ashenden, Labourer
marriage: 6 May 1844 Jonathan Stephen Ewars, signs Jonathan Stephen Ewers, of full age, bachelor, Labourer of Somers Town, son of Edward Ewars, Labourer
Elizabeth Sanders. of full age, spinster of Ashenden, daughter of William Sanders, Labourer
Witnesses Joseph Figg, Martha Figg
The
other Jonathan Ewers:
marriage: 03 Jan 1825 Jonathan Ewers, bachelor of the parish
Elizabeth Blake of Winchendon, Bucks
Witneesses ...X Ewers, Sarah Ewers
I think this Jonathan is the son of Jonathan & Ann Ewers and was christened on 17 Sep 1798, but I'll need to find all the Ewers bits I've got.
There are over 200 entries for the Ewers in Ashendon, so you'll have to excuse me if you get a bit at a time

I'll probably email you the parts of the tree I've done - when I've found it

Julie
PS The transcripts came from the Bucks Family History Society. I also have nearby Chearsly which has some Ewers in it too!