U+01DB "Ǜ" Latin Capital Letter U with Diaeresis and Grave Unicode Character
U+01DB "Ǜ" Latin Capital Letter U with Diaeresis and Grave is a composite glyph used in certain Latin script orthographies, primarily for the transliteration or representation of specific vowel sounds in languages such as German, Hungarian, and occasionally in scholarly notations for Old English or other medieval texts. It combines the letter U with a diaeresis (two dots above) indicating a modified pronunciation, like the front rounded vowel [y], and a grave accent (a slanted line above) that typically marks a falling tone or stressed syllable in linguistic contexts. While not common in standard modern alphabets, it serves a precise function in specialized writing systems where both vowel quality and tonal or stress information need to be encoded simultaneously, ensuring accurate textual representation in digital environments.
General Properties
| Code Point | U+01DB |
| Version Added | 1.1 |
| Name | Latin Capital Letter U with Diaeresis and Grave |
| Unicode 1.0 Name | Latin Capital Letter U Diaeresis Grave |
| Block | Latin Extended-B |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "Ü" U+00DC Latin Capital Letter U with Diaeresis "̀" U+0300 Combining Grave Accent |
Encodings
| HTML Decimal Encoding | Ǜ |
| HTML Hex Encoding | Ǜ |
| UTF-8 Encoding | 0xC7 0x9B |
| UTF-16 Encoding | 0x01DB |
| UTF-32 Encoding | 0x000001DB |
| C/C++/Java Escape | \u01db |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Uppercase | Yes |
| Simple Lowercase Code Point | "ǜ" U+01DC Latin Small Letter U with Diaeresis and Grave |
| Lowercase Code Point | "ǜ" U+01DC Latin Small Letter U with Diaeresis and Grave |
| Simple Case Folding | "ǜ" U+01DC Latin Small Letter U with Diaeresis and Grave |
| Case Folding | "ǜ" U+01DC Latin Small Letter U with Diaeresis and Grave |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "ǜ" U+01DC Latin Small Letter U with Diaeresis and Grave |
| NFKC Simple Casefold | "ǜ" U+01DC Latin Small Letter U with Diaeresis and Grave |
| Script | Latin |
| Script Extensions | Latin |
| 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 | Upper |