Your nephew
Your nephew
Your sister's husband is your father's son-in-law.
If your sister-in-law is the sister of your spouse, her son is not related to your sister's son. If your sister-in-law is the wife of your brother, her son and your sister's son are first cousins.
Yes, for a nephew is sister's son, brother's son, wife's brother's son, wife's sister's son, husband's brother's son, husband's sister's son
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.
Your sister-in-law's son is your nephew.
Your sister-in-law's son is your nephew.
Your sister-in-law in your son's aunt and he is her nephew.
Other than being your son-in-law's sister, there is no relationship.
Your sister-in-law's grandson is your great nephew.
Your daughter-in-law's sister is not related to you, but is your son's sister-in-law.
If your brother-in-law is your wife's brother, his son is your nephew and you are his uncle or aunt. If your brother-in-law is sister's husband and his son is also her son, he is your nephew and you are his uncle or aunt. If the brother-in-law's son is from a marriage to a woman other than your sister, and your sister has not adopted him, he is not related to you. However, you may choose to treat him as your nephew, especially if he came into your life as a young child and considers your sister to be his mother.