U+0419 "Й" Cyrillic Capital Letter Short I Unicode Character
Unicode Version 17.0
Й
U+0419 "Й" Cyrillic Capital Letter Short I is a letter used primarily in the Cyrillic script, representing a palatalized or iotated sound similar to the English consonant "y" in "boy" or "yes." It is derived from the Cyrillic letter И (I) with the addition of a breve diacritic, which indicates a shortened or consonantal pronunciation. This character is an essential part of alphabets for languages such as Russian, Bulgarian, and Ukrainian, where it appears in common words and names. Its uppercase form is distinct from the lowercase "й," and it occupies a fixed position in the Cyrillic alphabet, typically following the regular I.
General Properties
| Code Point | U+0419 |
| Version Added | 1.1 |
| Name | Cyrillic Capital Letter Short I |
| Unicode 1.0 Name | Cyrillic Capital Letter Short Ii |
| Block | Cyrillic |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "И" U+0418 Cyrillic Capital Letter I "̆" U+0306 Combining Breve |
Encodings
| HTML Decimal Encoding | Й |
| HTML Hex Encoding | Й |
| UTF-8 Encoding | 0xD0 0x99 |
| UTF-16 Encoding | 0x0419 |
| UTF-32 Encoding | 0x00000419 |
| C/C++/Java Escape | \u0419 |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| East Asian Width | Ambiguous |
| Uppercase | Yes |
| Simple Lowercase Code Point | "й" U+0439 Cyrillic Small Letter Short I |
| Lowercase Code Point | "й" U+0439 Cyrillic Small Letter Short I |
| Simple Case Folding | "й" U+0439 Cyrillic Small Letter Short I |
| Case Folding | "й" U+0439 Cyrillic Small Letter Short I |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "й" U+0439 Cyrillic Small Letter Short I |
| NFKC Simple Casefold | "й" U+0439 Cyrillic Small Letter Short I |
| 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 | Upper |