𐰈

Ultimately derived from Ancient Greek υ (u, “upsilon”) through intermediaries.

𐰈 (ü)

1. (Yenisei Kyrgyz) A letter of the Old Turkic runic script, representing /ø/ or /y/.

• Clauson, Gerard (1972) “ö/ö:/ü/ü:”, in The Origin of Turkic Runic Alphabet, London, pages 68 and 74
• Clauson, Gerard (1962) Turkish and Mongolian studies‎^[1], London: Royal Asiatic Society, page 80
• Ghirshman, Roman (1948) Les Chionites-Hephtalites‎^[2], Iran: Institut francais d'archeologie orientale, page 63