Dear Uncle bob,
I am sorry to inform you of the death of your sister.
Kind regards,
John Smith
Your uncle's sister is either you mother or your aunt.
Your father's brother is your uncle. Your uncle's wife is your aunt (and your father's sister-in-law). Her sister is not related to you or to your father, but is your uncle's sister-in-law.
Your uncle's sister is your aunt, or possibly your mother.
If your uncle is your uncle because he married the sister of your father or mother, thenhis sister is not related to you at all. In that case, your uncle's sister is not your aunt.Your uncle's sister who isn't your aunt is your mom.
To your sister's daughter you are an aunt (or uncle) and she is your niece. To your niece's daughter ( your sister's granddaughter) you are a great-aunt (or great-uncle) and she is your grand-niece.
Since your uncle's sister is your aunt, her daughter would be your cousin, just as your uncle's daughter would be.
She is your Great Aunt or your Grandmother.Breaking it down, your father's uncle is your great uncle. Your great uncle's brother is also your great uncle (or your grandfather), and his sister is your great Aunt (or grandmother).
Uncle in law
She is your Great Aunt or your Grandmother.Breaking it down, your father's uncle is your great uncle. Your great uncle's brother is also your great uncle (or your grandfather), and his sister is your great Aunt (or grandmother).
Your are a great uncle. I mean, I'm sure you're a wonderful uncle! But great uncle is your relationship. The child is your wife's sister's great grandchild, right? So you are great uncle.
Your relation to your dad's sister's husbnd would be uncle by marriage. Because your dad's sister is your aunt, therefore the person she marries is your uncle but because he isn't a bloodrelative he is an uncle by marriage.
Your sister's daughter and your sister's brother are niece and uncle to each other. The daughter is the niece of the brother and the brother is uncle to the daughter.