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O with diaeresis (Ӧ ӧ; italics: Ӧ ӧ) is a letter of the Cyrillic script. In all its forms it looks exactly like the Latin letter Ö (Ö ö Ö ö).
O with diaeresis is used in the alphabets of the Altay, Khakas, Komi, Kurdish, Mari, Shor and Udmurt languages.
Usage
In Altay, Khakas and Shor, it represents the close-mid front rounded vowel /ø/.
In Komi, it represents the schwa /ə/.
In Kurdish, it represents the close back rounded vowel /u/.
In Mari, it represents the open-mid front rounded vowel /œ/.
In Udmurt, it represents the open-mid back unrounded vowel /ʌ/.
In Russian books until the beginning of the 20th century, the letter Ӧ has been sporadically used instead of Ё in foreign names and loanwords (for example, the city of Cologne, Germany, which is Köln in German, might have been rendered in Russian as "Кӧльн").