U+1EF6 "Ỷ" Latin Capital Letter Y with Hook Above Unicode Character
Unicode Version 17.0
Ỷ
U+1EF6 "Ỷ" Latin Capital Letter Y with Hook Above is a specialized grapheme used primarily in the Vietnamese alphabet, where the hook above diacritic indicates a low, falling-rising tone known as the hỏi tone. This character represents the letter Y modified with a small hook placed above it, and it appears in written Vietnamese to distinguish tonal variations in words containing the vowel Y. While less common than other accented characters, Ỷ is essential for accurate phonetic representation and correct spelling in Vietnamese, particularly in formal writing, literature, and digital text where proper tonal marks are required for comprehension.
General Properties
| Code Point | U+1EF6 |
| Version Added | 1.1 |
| Name | Latin Capital Letter Y with Hook Above |
| Block | Latin Extended Additional |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "Y" U+0059 Latin Capital Letter Y "̉" U+0309 Combining Hook Above |
Encodings
| HTML Decimal Encoding | Ỷ |
| HTML Hex Encoding | Ỷ |
| UTF-8 Encoding | 0xE1 0xBB 0xB6 |
| UTF-16 Encoding | 0x1EF6 |
| UTF-32 Encoding | 0x00001EF6 |
| C/C++/Java Escape | \u1ef6 |
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 | "ỷ" U+1EF7 Latin Small Letter Y with Hook Above |
| Lowercase Code Point | "ỷ" U+1EF7 Latin Small Letter Y with Hook Above |
| Simple Case Folding | "ỷ" U+1EF7 Latin Small Letter Y with Hook Above |
| Case Folding | "ỷ" U+1EF7 Latin Small Letter Y with Hook Above |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "ỷ" U+1EF7 Latin Small Letter Y with Hook Above |
| NFKC Simple Casefold | "ỷ" U+1EF7 Latin Small Letter Y with Hook Above |
| 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 |