Use of the word "Babo" in Greece

[Nikolaj]

One of my grandmothers (Nana) is with very old Strumica origin, the other grandmother (Majche) is born in Strumica with partial Krushevo lineage and the one we called Babec had origin from Bogdanci.
I also remember my mother telling me that they used to call their grandmother "Stara Mama".

edit. Forgot to add that my mother used to call my grandfather's brother,from my fathers side, Chiko (Чико) and his wife China (Чина).

I have never heard of Chiko, but it does sound somewhat related to Chich/Chicho, or furthest but unrealistic Chichko.