Muhammed is the most common Muslim males name.
Without knowing which Muhammed you mean, it is impossible to answer. If you are referring to THE Muhammed (prophet) and/or doing the NY Times crossword, the answer is "Ali"
No. Your son-in-law's brother may be a son-in-law if he is married, but he is not your son-in-law.
No, your son-in-law is married to your daughter and his brother is not your son-in-law, but simply your son-in-law's brother or your daughter's brother-in-law.
If your sister-in-law is the wife of your brother, she is the mother of your brother's son. Her son-in-law would then be the brother-in-law of your brother's son. If your sister-in-law is your spouse's sister, her son-in-law is not related to you or to your brother's son.
Mother-in-lax & Son-in-law - i think it is correct
Your son-in-law's brother's son is not related to you, but is your daughter's nephew.
It is written as 'son-in-law.'
No. A son-in-law is a contemporary.
The possessive form of the compound noun son-in-law is son-in-law's.Example: My son-in-law's name is James.
The possessive form of the singular noun son-in-law is son-in-law's.Example: My son-in-law's name is Harry.
Sons-in-law is the plural for son-in-law.
The father of a son-in-law is typically referred to as the father-in-law.
Tutankhamen was Akhenaton's son in law