Question

if u were my father's granny's eldest son's son who would u be??​

Answer 1

Answer:

You would be my paternal uncle

Answer 2

$\huge\mathfrak\purple {Answer:}$

Father's granny is your paternal great grandma.

Great grandma's eldest son could be your paternal grandpa or the brother of your original paternal grandma/grandpa.

So his son would most likely be your father or one of his cousins who could be one of your paternal uncles.

$\mathfrak\purple {Hope\: this\: helps\: you...}$