Your grandson and your sister's grandson are second cousins to each other.
Your granddaughter and your sister's granddaughter are second cousins.
she would be his niece
Great grandmother and great granddaughter
great auntie or uncle's
First cousins once removed.
grandfather grandson.
Sisters
if you are : 1. male , you are known to be as the child's uncle. and 2.if female , aunt
Distinguish between a public law relationship and a private law relationship.
What is the relationship between ethics and WHAT? You need at least two things to have a relationship.
Your sisters grandson would be your grandnephew.
Your grandson and your brother's grandson are second cousins to each other.
Your sister's son is your nephew and you are his aunt (if you are female) or his uncle (if you are male.
Your granddaughter and your sister's grandson are second cousins.
nothing
Aunt and nephew
First cousins
First cousins
grandfather grandson.
Sisters
Sisters.
Your great great grandmother's sister's great great grandson is your third cousin, twice removed.