John Lewis was a common name in Wales. There were possibly two other Mormons named John Lewis in Tredegar Branch records. However, this writing by a John Lewis in 1856 is very likely that of John Lewis (1822-1867) who married Jane Vaughan (1827-1890).
|Handwritten note from the Tredegar Branch Register of Members, LDS CHL LR_164_7_00024.|
|John Lewis Letter, LDS CHL "Letters to Brigham Young, 15 December 1856"|
Comparing this dated February 9, 1856 with John Lewis's known handwriting from the December 15, 1856 letter to Brigham Young, we can see some similarities.
The earlier writing is a bit neater but it is on lined paper and likely with decent quality ink in Tredegar, Wales. The letter to Pres. Young has no lines and we don't know the quality of ink they may have had in Springville, 1856.
There are similarities in the spelling mistakes that permeate both writings. "Presadent" is the same in both examples.
And most importantly, the name "John Lewis" appears very similar in both with the very similar flourishes on top of the "J" in "John."
I'm going to call it for our ancestor-in-law, John Lewis.