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The common ancestor is your parents.
Your children and your sister's children are first cousins.
Your grandchildren and your sister's grandchildren are second cousins.
Your great-grandchildren and your sister's great-grandchildren are third cousins.
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∙ 13y ago
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What is the relation of a husband to his sister's grandchildren is it great Uncle?
Yes, he is their great uncle.
Are a sister's grandchildren her sister's grandchildren?
No, they`d be the second sisters great nieces and nephews
What relation would you call your sister's grandchildren?
They are your great nephews and/or great nieces. Alternately, some people say grand-nephews, grand-nieces.
What relation is your brother's sister in relation to you?
Real sister, half sister, or step sister
What is my relation with my relation of wife's sister?
sister in law.
What is the relation to your sister's sister?
Your sister's sister is your sister.
What relation is your sons kids to you?
Your son's children are your grandchildren.
What relation are you to your sisters grandchildren if you are female?
You would be their great Aunt.
How are your children related to your sister's children's children?
Your sister's children's children are her grandchildren.Your children and your sister's grand children are first cousins, once removed.Your grandchildren and your sister's grandchildren are second cousins.
What is the relationship of your sister to your grandchildren?
Great aunt
What relation is your sister's sister-in-law to you?
No relation whatsoever. You will be an aunt or uncle to your sister's child and your brother-in-law's sister will be the child's aunt, but that's as close as it gets.
What is your relation to your mothers sister?
Your mothers sister is your Aunt
