Kalogredis, Calogredis

Hi I am trying to get information on my great grandparents who left Kythera around 1907 for America. I have seen so many different spellings of their name I dont know what is right anymore. There names were George and Mary Calogredis (American spelling) I have a birth certificate of my mother's that lists the town her grandparents were from but I cannot read it or know anyone to translate it for me. Does anyone know of a person that can help? Thank you,
Pam Sherman