You might try writing to the Town Clerk in Geneva, Ashtabula as it appears that is her residence in 1930, she is listed as a widow., so any marriage would take place after that census. They may also have a death certificate on file with more information. I didn't find a marriage or death with the name Tuttle, did find her marriage to Albert. She was b. in WV.
West Virginia Marriages, 1780-1970
Citing this Record: "West Virginia Marriages, 1780-1970," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FBZH-PWT ), Albert Efaw and Rebecca Santes, Monongalia, West Virginia, United States; citing ; FHL microfilm 840910.
Name: Albert Efaw
Age 24 Birthplace Monongalia, WV
Spouse: Rebecca Santes
Age 24 Birthplace Monongalia, WV
Marriage: 1901 Monongalia, WV
Affiliate Repository Type: County Records
United States Census, 1930 Geneva, Ashtabula, Ohio
Citing this Record: "United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X49Y-KN3 ), Rebecca Efaw, Geneva, Ashtabula, Ohio, United States; citing enumeration district (ED) 0032, sheet 18B, family 526, NARA microfilm publication T626, roll 1748.
Rebecca Efaw Head F 52 West Virginia Widown
Anna R Prunty Granddau F 4 Ohio
Charles King Grandson M 3 Ohio
More records: Albert Efaw b. West Virginia husband of Rebecca Santee
https://familysearch.org/search/record/results?count=20&query=%2Bgivenname%3Aalbert~%20%2Bsurname%3AEfaw~%20%2Bbirth_place%3Aoh~%20%2Bbirth_year%3A1870-1879~%20%2Bspouse_givenname%3Arebecca~