What is my sister's relationship to my granddaughter?

Answer 1

Your sister is the great-aunt (also written great aunt) of your granddaughter.

Answer 2

Your sister's grandchildren are your great nieces (girls) and great nephews (boys). You are their great aunt (if you are a woman) or great uncle (if you are a man).

Answer 3

That would be her great uncle I suppose. Common sense.

Answer 4

Your sister's child and your child are first cousins. Your sister's child and your grandchild are first cousins, once removed.

Answer 5

Your sister's daughter is your niece. They are your children's first cousin. Your grandchildren would be first cousins once removed.

Answer 6

Your sister is her great grandaunt.

Answer 7

Greataunt