U+04F1 "ӱ" Cyrillic Small Letter U with Diaeresis Unicode Character
U+04F1 "ӱ" Cyrillic Small Letter U with Diaeresis is a variant of the Cyrillic letter U with an umlaut or diaeresis mark above it, used primarily in certain non-Slavic languages that employ the Cyrillic script, such as Khanty, Komi, and Altai, to represent a specific fronted or centralized vowel sound distinct from the plain U. It is encoded in the Cyrillic block of Unicode and is the lowercase form corresponding to the uppercase version U+04F0 "Ӱ". This letter appears in linguistic contexts where precise vowel articulation is necessary, and it is often romanized as "ü" or "iu" to reflect its pronunciation. The diaeresis indicates that the vowel should be pronounced separately from a preceding vowel or, more commonly, that it has a modified quality, typically a front rounded vowel like the German ü.
General Properties
| Code Point | U+04F1 |
| Version Added | 1.1 |
| Name | Cyrillic Small Letter U with Diaeresis |
| Block | Cyrillic |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "у" U+0443 Cyrillic Small Letter U "̈" U+0308 Combining Diaeresis |
Encodings
| HTML Decimal Encoding | ӱ |
| HTML Hex Encoding | ӱ |
| UTF-8 Encoding | 0xD3 0xB1 |
| UTF-16 Encoding | 0x04F1 |
| UTF-32 Encoding | 0x000004F1 |
| C/C++/Java Escape | \u04f1 |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Ӱ" U+04F0 Cyrillic Capital Letter U with Diaeresis |
| Simple Titlecase Code Point | "Ӱ" U+04F0 Cyrillic Capital Letter U with Diaeresis |
| Uppercase Code Point | "Ӱ" U+04F0 Cyrillic Capital Letter U with Diaeresis |
| Titlecase Code Point | "Ӱ" U+04F0 Cyrillic Capital Letter U with Diaeresis |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| Script | Cyrillic |
| Script Extensions | Cyrillic |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Lower |