I found what looks like a marriage record for Edward Showler:
"England Marriages, 1538–1973 ," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:N2TH-FQW : 10 February 2018), Edward Showler and Elizabeth Pardy, 19 Apr 1704; citing Great Horwood,Buckingham,England, reference , index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 919,232.
[Added more information below.]
I found a lot of children born in Horwood, Buckingham, England to a Thomae and Joanne Showler (on FamilySearch), but I could not find an Edward Showler born to that couple.
Could you please include a link to the person who needs these people added as parents?