By his first name
Unfaithful, a cheater and many other names that are inappropriate for me to say on this website.
You do you call your sons's son your "grandson" !
Dads typically call their sons by their first names or nicknames.
The sons of your father's sister are your first cousins.
Nephew.
Nephews
Moms typically call their sons "sweetheart" or "honey" as terms of endearment or affection.
natini
The names of John Lennon's 2 sons are Sean and Julian.
nephews!
My sister's son is my nephew.
how about her name..