Family Members Names
Again, for the sake of comparison, I'll show the examples in Portuguese:

Avô (Grandfather), Bisavô (Great-grandfather), Trisavô, Tetravô, Pentavô, Hexavô and so on.
We keep ordering with the greek numbers the older relatives.
Or, in a informal and funny way of speaking, we would change 'trisavô' for 'tataravô' (a corruption of 'tetravô', actually) and just add 'tatara-' for every older generation. So, 'tataratataravô', tataratataratataravô', like a machine gun, a test of our tongues' skill as well.

How to say that in English? We should add 'Great-' for every older generation (e.g. Great-great-grandfather)?

Question

Family Members Names
Again, for the sake of comparison, I'll show the examples in Portuguese:

Avô (Grandfather), Bisavô (Great-grandfather), Trisavô, Tetravô, Pentavô, Hexavô and so on.
We keep ordering with the greek numbers the older relatives.
Or, in a informal and funny way of speaking, we would change 'trisavô' for 'tataravô' (a corruption of 'tetravô', actually) and just add 'tatara-' for every older generation. So, 'tataratataravô', tataratataratataravô', like a machine gun, a test of our tongues' skill as well.

How to say that in English? We should add 'Great-' for every older generation (e.g. Great-great-grandfather)?

Answer

Yes, it's "great-great-great-" if you like, or "fifth-great, sixth-great," etc., as in Portuguese.

We also say, "My grandfather's grandfather,", etc., or "my grandfather seven generations back on my mother's side", etc.

Evden çıkmadan dil öğrenme fırsatını kaçırmayın. Deneyimli dil eğitmenlerimizden oluşan seçkimize göz atın ve ilk dersinize şimdi kaydolun!