U with double acute (Cyrillic)
U with double acute (Ӳ ӳ; italics: Ӳ ӳ) is a letter of the Cyrillic script, derived from the Cyrillic letter U (У у У у). U with double acute is only used in the Chuvash language, where it represents the close front rounded vowel /y/, the pronunciation of the Latin letter U with umlaut (Ü ü) in German.
Source: Wikipedia — U with double acute (Cyrillic) (CC BY-SA 4.0)