aunt

First recorded in 1250–1300; Middle English aunte, from Anglo-French, equivalent to Old French ante, from Latin amita “father's sister,” old feminine past participle of amāre “to love,” i.e., “beloved”

The usual vowel of aunt in the United States is the [a] /æ/ of rant except in New England and eastern Virginia, where it is commonly the “New England broad a, ” a vowel similar to French [a] /a/ and having a quality between the [a] /æ/ of hat and the [ah] /ɑ/ of car. The vowel [ah] /ɑ/ itself is also used. In New England and eastern Virginia [ah] /ɑ/ or the [a] /a/ -like sound occur in aunt in the speech of all social groups, even where a “broad a ” is not used in words like dance and laugh. Elsewhere, the “broader” a is chiefly an educated pronunciation, fostered by the schools with only partial success (“Your relative isn't an insect, is she?”), and is sometimes regarded as an affectation. Aunt with the vowel of paint is chiefly South Midland United States and is limited to folk speech.
The [a] /æ/ pronunciation of aunt was brought to America before British English developed the [ah] /ɑ/ in such words as aunt, dance, and laugh. In American English, [ah] /ɑ/ is most common in the areas that maintained the closest cultural ties with England after the [ah] /ɑ/ pronunciation developed there in these words.

C13: from Old French ante, from Latin amita a father's sister