I have checked my book named "The Jeffs Families" written by L.D. Jeffs and published in 1973, and there is no mention of Thomas Jeffs born before 1958 or his wife Elizabeth Pierson. My books starts with
You might try looking for Thomas with a different spelling.
Dictionaries of surnames indicate probable spelling variations. The most predominent variations of Jeffs are Jeffes, Jeff, Jeffe.
Since many of the variations of the Jeffs surname is known to researchers more variations include but is not limited to the following: Jheffs, Jeffes, Jefes, Jeves, Geves, Geffes, Jelphs, Jevs.
Just a thought it is very common to have names change due to typos in census transcriptions or similar very honest events.