Your sister's son, is your nephew.
A siblings son is always called a nephew
Your nephew
cousin
Your daughter and your sister's son are first cousins to each other.
Uncle or Auntie.
Your sister's son is your nephew and you are his aunt (if you are female) or his uncle (if you are male.
55Is not this the carpenter's son? is not his mother called Mary? and his brethren, James, and Joses, and Simon, and Judas? 56And his sisters, are they not all with us?
Bastet had a twin sister Called Sekhmet who later on had a son called Maahes but she did not have any brothers
Your sister's son is your nephew.
No, making your son wear his sisters pants is not a good punishment.
Cousin
He is your cousin
nephew
Our cousins are our mothers sisters son :)
Your sister's daughter's son would be your grandnephew.
My sister's son is my nephew.
me (I am a man with a mother, but no brothers or sisters)
Well, it depends how close you are to your husbands family. If you really want to know they are cousins-in-law.
We would infact, cll our sisters son your nephew and they would call you either auntie or uncle depending on your sex.
Your son and your sisters child are first cousins. The granddaughter is out of synch by a generation. That will make them first cousins once removed.