There are 2 ways of sayin it:
1)dye-doosh-kah
2)dyet
The translation for "grandfather" from Russian to English is "дедушка" or "дед" (dedushka or ded).
The Russian word for grandfather is "дедушка" (pronounced "dedushka").
grandfather-дедушка(dedushka)
Your great great grandfather.
Your father's grandfather is your great grandfather.
Your great great grandfather.
Your great grandfather
Your great grandfather
Your father's grandfather is your great grandfather.
Your grandfather's brother is your great uncle.
You call him grandfather.
He would be your great, great grandfather, but you could call him whatever endearing name you and he prefer -- Granddad, Papa, Grandpa, etc.