Hi there.

My name is Michael Ewers and I'm descended from the Ashendon Ewers' and have been tracing the family tree for a couple of years, assembling considerable data in that time.
I believe that the Eli who was your ancestor is probably Elias Ewers, born about 29th August 1824 in Ashendon.
Elias was the son of Edward Ewers, born about 6th November 1789 in Ashendon, and Elizabeth (possibly Ball) who were married about 1811.
Edward Ewers was the son of Jonathan Ewers, born about 19th January 1734 in Ashendon, and Hannah (no surname or date of birth yet identified), their date of marriage is not yet identified.
Jonathan Ewers was the son of Richard Ewers, born about 19th January 1734 in Ashendon, and Sarah Turner who married on the 26th April 1764 in Ashendon.
Richard Ewers was probably the son of Robert Ewers and Eliza but this is still subject to confirmation.
All birth dates are given as the dates of christening as actual birth dates are difficult to establish.
I hope this adds to your knowledge and any additions or clarifications you can make would be appreciated.
Good luck with your research.