What is the relationship of your sister and your grandson?

Answer Your sister would be your grandson's great aunt.

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What relationship is your sister to your grandson?

Your sister is your grandson's great aunt. He is her great nephew.

What is the relationship of your sister's child and your grandson?

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

What is the relationship name for your daughter-in-law's grandson?

If your daughter-in-law's grandson is a child from a marriage before she married your son, or after their marriage ended, her grandson is not related to you. If he is a child of the marriage betwe... Read More »

What relationship is your grandson to your nieces son?

Your grandson and your niece's son are second cousins.