That would be an uncle.
The word for uncle in Hindi is "चाचा" (chacha) for father's brother and "मामा" (mama) for mother's brother.
papu
In Farsi, you would say "amoo" for mother's brother.
brother
uncle
Your Uncle.
Your mother's son is your brother or your half brother.
A cousin brother means , the son of the father or mothers , brother or sister.
mamo
your uncle
His relationship to you is brother-in-law.
Your half-brother...