A person's son's son would be their grandson. Your son's daughter would be your granddaughter. Your grandson's son would be your great grandson.
cousin
He has one son called Edson.
Sons would be plural and son's is possessive. Tickyul
He has a son called Zac and a daughter called Liberty!
Enzo Ferraris son was called Dino
because they are the sons of the people
dappys son is called gino
basiclly there called brothers .-.-.-.-.-.-. basically* for one... and two no, they wouldn't be called brothers. If it was their parents sons then yeah, but if it's the sons of brothers then they'd be cousins. That's practically like saying one brother got married and had a son, then the other did too and had a son as well. The relation of the sons would be cousins.
You do you call your sons's son your "grandson" !
he has two sons named joey and jakob
He had three sons: Damerei, Carew, and Wat (Walter)
She had two sons ... Sean Preston and Jayden James