Amir’s daughter mother i.e. Amir’s wife Amir’s wife’s father’s son (Manjeet) i.e.brother of Amir’s wife hence Manjeet is Amir’s brother in law. Amir’s daughter mother i.e. Amir’s wife Amir’s wife’s father’s son (Manjeet) i.e. brother of Amir’s wife hence Manjeet is Amir’s brother in law.