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 Altai, Khanty, Khakas, Komi, Kurdish, Mari, Shor and Udmurt languages.