Your uncle's granddaughter and your child are second cousins.
WHAT relationship* is your Gramps to your great granddaughter? pretty tricky but (distant sisters one off)
your uncles daughter would be your cousin
your niece
You granddaughter is a great great niece of your aunt. Your aunt is your granddaughter's great great aunt.
Great neice
Your granddaughter and grand niece are second cousins to each other.
Your great nephew and your granddaughter are second cousins to each other.
No. The sister is a relation, and her husband is an in-law. The husband's brother is no biological relation either. Therefore, the great granddaughter of the husband's brother is not a relation.
Great niece
Your granddaughter and your grandniece are second cousins or third cousins to each other
Cousin. Your parents brothers and sisters are aunts and uncles. and the aunt and uncles children are your cousins.
No relation ..