U+0151 "ő" Latin Small Letter O with Double Acute Unicode Character
Unicode Version 17.0
ő
U+0151 "ő" Latin Small Letter O with Double Acute is a Latin script glyph used primarily in the Hungarian language, where it represents a long, close-mid front rounded vowel sound, distinct from the basic "o" and often appearing in words like "ősz" (autumn) or "szőlő" (grape). Its visual form consists of a standard lowercase "o" topped with two acute accent marks placed side by side, which differentiates it from the single-accented "ó". This character is encoded in Unicode to support proper orthography and text processing for Hungarian and other languages that require this specific diacritic combination.
General Properties
| Code Point | U+0151 |
| Version Added | 1.1 |
| Name | Latin Small Letter O with Double Acute |
| Unicode 1.0 Name | Latin Small Letter O Double Acute |
| Block | Latin Extended-A |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "o" U+006F Latin Small Letter O "̋" U+030B Combining Double Acute Accent |
Encodings
| HTML Decimal Encoding | ő |
| HTML Hex Encoding | ő |
| UTF-8 Encoding | 0xC5 0x91 |
| UTF-16 Encoding | 0x0151 |
| UTF-32 Encoding | 0x00000151 |
| C/C++/Java Escape | \u0151 |
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 | "Ő" U+0150 Latin Capital Letter O with Double Acute |
| Simple Titlecase Code Point | "Ő" U+0150 Latin Capital Letter O with Double Acute |
| Uppercase Code Point | "Ő" U+0150 Latin Capital Letter O with Double Acute |
| Titlecase Code Point | "Ő" U+0150 Latin Capital Letter O with Double Acute |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| 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 | Lower |