If you are looking for the names of your great grandparents I have a suggestion. Look up your grandparents names in the Social security death index. For example: I found a Maria M. Cueto born 17 June 1883 and Died in Tampa, Florida on 15 June 1970 in the social security index (this may be your Grandmother). Write the SS Administration and request a copy of her SS application. The application will give you the following information:
Full name
Full name at birth (including maiden name)
Present mailing address
Age at last birthday
Date of birth
Place of birth (City, county, state)
Father's full name "regardless of whether living or dead"
Mother's full name, including maiden name, "regardless of whether living or dead"
Sex and race
Ever applied for SS number/Railroad Retirement before? Yes/No
Current employer's name and address
Date signed
Applicant's signature
The application costs around $27 dollars and takes a few weeks to receive. Email me and I can give you exact instructions on how to submit the request. The application is written by the applicant, so there is very little chance of mistakes. This is not the case for Death Certificates. Since the next of kin fills out the paperwork there are often mistakes when it comes to mother's maiden name. Even though death certificates often are full of mistakes, it might be worth it to request a copy from Florida. You can usually do that online on various websites. I use
www.vitalrec.com. It usually takes a week or two to receive the documents.
Good luck in your search!