It kind of depends... I'm sure it has to be legalized depending on where you live, but generally there's a reason to make it be able to be legalized. Like is their mother taking care of them? Are the parents divorced?
no, unfortunantely, they are not. true brothers are born to the same mother and the same father.
father junipero serra had two brothers! and two siters
father junipero serra had two brothers! and two siters
They are half brothers
No Jackie Chan does not have any full brothers. He does have two half brothers, who are his father's sons from a previous marriage.
Tiger Woods did not have any brothers or sisters, he was an only child. Although he was very attached to his father. Tiger has 2 half brothers and 1 half sister.
Brothers Gogolak
Yes, he is the oldest. He has two half-brothers, Jonathan and Steven on his father's side.
Audrey had two half brothers Alexander and Ian
Yes he did. His father was an only child, but his mother Elizabeth of York had several brothers. Elizabeth had two half brothers and two full brothers (the Princes in the tower)
As long as one knows who his father is. Otherwise, you're just determining they are brothers.
Yes, DNA analysis can distinguish between two brothers.