U+1EF8 "Ỹ" Latin Capital Letter Y with Tilde Unicode Character
Unicode Version 17.0
Ỹ
U+1EF8 "Ỹ" Latin Capital Letter Y with Tilde is a precomposed glyph used in the Vietnamese alphabet to represent the vowel sound /ɨ/ pronounced with a falling then rising creaky tone, known as the "ngã" tone. This character is formed by combining the Latin letter Y with a tilde diacritic mark placed above it, and it is encoded in Unicode as part of the Latin Extended Additional block to support the accurate digital representation of Vietnamese text. The tilde indicates a specific tonal contour that modifies the pronunciation of the base vowel in the Vietnamese language.
General Properties
| Code Point | U+1EF8 |
| Version Added | 1.1 |
| Name | Latin Capital Letter Y with Tilde |
| 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+0303 Combining Tilde |
Encodings
| HTML Decimal Encoding | Ỹ |
| HTML Hex Encoding | Ỹ |
| UTF-8 Encoding | 0xE1 0xBB 0xB8 |
| UTF-16 Encoding | 0x1EF8 |
| UTF-32 Encoding | 0x00001EF8 |
| C/C++/Java Escape | \u1ef8 |
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 | "ỹ" U+1EF9 Latin Small Letter Y with Tilde |
| Lowercase Code Point | "ỹ" U+1EF9 Latin Small Letter Y with Tilde |
| Simple Case Folding | "ỹ" U+1EF9 Latin Small Letter Y with Tilde |
| Case Folding | "ỹ" U+1EF9 Latin Small Letter Y with Tilde |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "ỹ" U+1EF9 Latin Small Letter Y with Tilde |
| NFKC Simple Casefold | "ỹ" U+1EF9 Latin Small Letter Y with Tilde |
| 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 |