In spanish, aunt is tia and uncle is tio.
"Tía" means Aunt in Spanish. "Tío" means Uncle.
Tia means Princess
The phrase means Aunt Mary or Aunt Marie= In Spanish. Tia is aunt, Tio is Uncle, you have heard of Tio Samuel of July 4th birthday!
Mother - Madre Father - Padre Sister - Hermana Brother - Hermano Aunt - Tia Uncle - Tio
Uncle is to aunt as father is to mother.
Sister-in-law describes a female. Brother-in-law describes a male.
The Spanish word for "aunt" does not change, no matter whether you have a niece or a nephew. The Spanish word for "aunt" is "tía". It it pronounced "TEE-ah". Please see this site for confirmation of the translation: http://www.answers.com/library/Translations
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.