Contact the clerk of the probate court in the county where the deceased lived. The interested party must be able to supply proof of their relationship to the deceased and verifiable information concerning the case.
Uncle is to aunt as father is to mother.
Your uncle-by-marriage's nephews might be you and your siblings. You are your uncle's nephew or niece.They might be the children of your aunt's siblings (your aunt being his wife), in which case they are your cousins.If they are your uncle's nephews by virtue of being children of his siblings, they are no relation to you at all.
Sister-in-law describes a female. Brother-in-law describes a male.
The opposite relationship of uncle would be Niece or Nephew.(The opposite gender is aunt.)
The son of your aunt and uncle is your first cousin.
If your aunt has a brother who is not your uncle, then your aunt is the wife of one of your parent's brothers, and that aunt's brother is no relation to you.
Great great aunt/uncle. To your niece, you are the aunt/uncle, to her child you would be the great aunt/uncle. So you would then be the great great aunt/uncle of her child's child (her grandson)
Your niece will call you her aunt or uncle.
I saw your aunt and uncle
In spanish, aunt is tia and uncle is tio.
Your uncle's sister is your aunt, or possibly your mother.
Your husband's nephew is also your nephew, and you are his aunt. Remember that if your father has a married brother, the brother is your uncle and the brother's wife is your aunt , with no mention of one being related by marriage and the other not. They are simply your aunt and uncle. The same applies to your relationship to your husband's sibling's children. You are simply their aunt.