A with diaeresis (Ӓ ӓ; italics:
Ӓ ӓ) is a letter of the Cyrillic script. In all its forms it looks exactly like the Latin letter A with diaeresis (Ä ä Ä ä).It is used in the Khanty, Kildin Sami, and Hill Mari languages. Also, this letter was once used in the Gagauz language (which was substituted with (аь)).
It was used in the Bashkir language at the end of the 19th century. It corresponds to the Cyrillic letter schwa (ә) in modern Bashkir.
This letter also appears in Serbian in some of its dialects.
In Hill Mari and Gagauz this letter represents the near-open front unrounded vowel, pronounced as //æ//.
In Kildin Sami this letter represents the open back unrounded vowel pronounced as //a// following a palatalized (sometimes also called "half-palatalized") velar nasal pronounced as //nʲ// or one of the alveolar stops pronounced as //tʲ// or pronounced as //dʲ//.
In Khanty this letter represents the near-open central vowel pronounced as //ɐ//.
Some languages represent as pronounced as //ja//, like in letter "Я".
A with diaeresis is used in some South Slavic languages, mainly in the Serbian language to be used for easily shifting the accents in the above languages not only in declensions but elsewhere: брӓт.[1] [2]