Frankenstein in Cincinnati

Hi,
Im rescently looking to learn about my family roots.
I have my fathers last name but im ultimately in the frankenstein family and will be chaning my last name later.

My grandfather is Melvin frankenstein and his wife is june frankenstein (previously june brandenburg(sp?)
Melvins father was John frankenstein.

My mother has previously paid for a professional family record to be created but they said they found nothing.

I was hoping some one here had some info. This is really important to me :) Thanks in advance.