This won't answer your question, but cause you more research. John Jacob Moorer will on on Find A Grave , states his daughter was married to Thomas H Snow, and daughter Orinda was married to Elijah H Snow.. You may want to look for full copy of will. https://www.findagrave.com/memorial/31449227/john-jacob-moorer
Then i found this, which is another Elvira Snow, 1850 census
Name Elvira Snow
Sex Female
Age 26 years
Birth Year (Estimated) 1824
Birthplace South Carolina
Race White
Event Type Census
Event Date 1850
Event Place Lowndes, Alabama, United States
Event Place (Original) Lowndes county, Lowndes, Alabama, United States
Household Identifier 543
House Number 543
Line Number 6
Schedule Type 1850 Population
Affiliate Publication Number M432
Affiliate Name The U.S. National Archives and Records Administration (NARA)
G C Snow
M
31 years
South Carolina
Eugene Snow
F
4 years
Alabama