Nephews are the sons of your brother or sister. Therefore nephews who are not brothers to each other are first cousins to each other.
Distinguish between a public law relationship and a private law relationship.
Your nephew's children are your great nieces (girls) and great nephews (boys). You are their great uncle or great aunt, depending on your sex.
What is the relationship between ethics and WHAT? You need at least two things to have a relationship.
a relationship between brothers should be sacred and good....
there is no relationship
Your sister's husband is your children's uncle. They are his nieces and nephews.
Great nephew
He is their Uncle and they are nieces and nephews.
Second cousins.
Your brother's children would be your nieces and nephews.
Your brother-in-law's children are your nephews and nieces.
If it's your sister then your sister, if it's your brother's wife then you sister-in-law
nece and nefu i spelled it wrong though sorry if someone could update this better Your daughters are his nieces by marriage and your sons are his nephews by marriage.
Your sister's husband is your brother-in-law. Your brother-in-law's brother is not related to you and neither are his children. But he is your sister's brother-in-law and his children are your sister's nieces and nephews.
Your borther-in-law is your grandchildren's great uncle. They are his great nieces and great nephews.
You do not have a niece-in-law. Some of your nieces and nephews are that because they are the children of your husband's siblings. They are your nieces and nephews and you and your husband together are their "aunt and uncle."
Your daughter is you great nephews great cousin if u live in Australia ,USA ,UK