Double acute: Hungarian ő and ű

Quick copy

Details for U+0151

LATIN SMALL LETTER O WITH DOUBLE ACUTE

Exact sequence: ő

U+0151

Properties: Ll; CCC 0
HTML: ő
Word Alt+X: 0151
Normalization: NFC: U+0151; NFD: U+006F U+030B; NFKC: U+0151; NFKD: U+006F U+030B

Details for U+0171

LATIN SMALL LETTER U WITH DOUBLE ACUTE

Exact sequence: ű

U+0171

Properties: Ll; CCC 0
HTML: ű
Word Alt+X: 0171
Normalization: NFC: U+0171; NFD: U+0075 U+030B; NFKC: U+0171; NFKD: U+0075 U+030B

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The double acute is a pair of rising strokes above a letter. Hungarian ő and ű use this sign; their capitals are Ő and Ű. [4], [32], [4]

Copy exact examples

Details for U+006F U+030B

LATIN SMALL LETTER O + COMBINING DOUBLE ACUTE ACCENT

Exact sequence: ő

U+006F U+030B

Details for U+0150

LATIN CAPITAL LETTER O WITH DOUBLE ACUTE

Exact sequence: Ő

U+0150

Details for U+02DD

DOUBLE ACUTE ACCENT

Exact sequence: ˝

U+02DD

Uses and scope

Hungarian spelling distinguishes ö from ő and ü from ű as short and long vowel letters. Unicode also annotates the mark for Chuvash usage, but that annotation is not a complete Chuvash orthography guide. The Hungarian collection is the current spelling example supported here by an official authority. [32], [4]

Similar shapes, different characters

U+030B is one combining mark, not two U+0301 characters. Repeating an acute does not create a canonically equivalent double acute. Double grave U+030F slopes the other way, and diaeresis U+0308 is the two-dot mark. A spacing ˝ remains a separate character. [1], [2], [32], [4]

Typing and text forms

Copying is exact; preview circles are excluded. Compare normalization forms.

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HTML: Use UTF-8 text or the numeric references in Details, in order.

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Searchable character table

The records include listed signs and encoded letters whose canonical decomposition contains one of this page's combining signs. This Unicode relationship does not prove membership in the languages discussed above. [1], [2]

Double acute: Hungarian ő and ű: exact character records
Copy	Unicode identity and entry
	COMBINING DOUBLE ACUTE ACCENT Details Properties `Mn; CCC 230` HTML `̋` Word Alt+X `030B` Normalization `NFC: U+030B; NFD: U+030B; NFKC: U+030B; NFKD: U+030B`
	DOUBLE ACUTE ACCENT Details Properties `Sk; CCC 0` HTML `˝` Word Alt+X `02DD` Normalization `NFC: U+02DD; NFD: U+02DD; NFKC: U+0020 U+030B; NFKD: U+0020 U+030B`
	LATIN CAPITAL LETTER O WITH DOUBLE ACUTE Details Properties `Lu; CCC 0` HTML `Ő` Word Alt+X `0150` Normalization `NFC: U+0150; NFD: U+004F U+030B; NFKC: U+0150; NFKD: U+004F U+030B`
	LATIN CAPITAL LETTER U WITH DOUBLE ACUTE Details Properties `Lu; CCC 0` HTML `Ű` Word Alt+X `0170` Normalization `NFC: U+0170; NFD: U+0055 U+030B; NFKC: U+0170; NFKD: U+0055 U+030B`
	CYRILLIC CAPITAL LETTER U WITH DOUBLE ACUTE Details Properties `Lu; CCC 0` HTML `Ӳ` Word Alt+X `04F2` Normalization `NFC: U+04F2; NFD: U+0423 U+030B; NFKC: U+04F2; NFKD: U+0423 U+030B`
	CYRILLIC SMALL LETTER U WITH DOUBLE ACUTE Details Properties `Ll; CCC 0` HTML `ӳ` Word Alt+X `04F3` Normalization `NFC: U+04F3; NFD: U+0443 U+030B; NFKC: U+04F3; NFKD: U+0443 U+030B`

Sources and method

Usage statements link to the authority that supports their scope. Character names, categories, combining classes and normalization results come from the pinned Unicode data. A canonical decomposition does not establish language membership or spelling frequency.

Source access date: 2026-09-14.

[4] Unicode combining mark names and annotations. Names, cross references and narrowly attributed usage annotations. Historical annotations are not automatically current recommendations.
[32] Hungarian Academy: spelling rules, twelfth edition. Hungarian vowel letters, accents and alphabetic ordering.
[1] Unicode Character Database 17.0.0.
[2] Unicode normalization, UAX #15.
[10] Microsoft: Unicode character entry in Word.
[11] Apple: enter characters with accent marks.
[12] Google: use Gboard.
[13] Unicode: fonts and keyboards FAQ.
[14] HTML numeric character references.

Read the editorial method and inspect the underlying datasets.

Sources, versions and limits

Encoded properties: Properties use Unicode 17.0.0. Normalization follows UAX #15; grapheme boundaries follow UAX #29. Script associations describe encoded properties, not language use.
Language evidence: CLDR 48.2and the IANA registry dated 2026-08-08. Main and auxiliary exemplars are distinct. CLDR exemplars are not complete orthographies.
Review and limitations: The dataset is derived from the sources above. Editorial guides cite additional scoped authorities. No native or specialist orthography approval is implied. Release scope date: 14 September 2026. Historic or specialist usage needs separate evidence. Registry-only records have unknown orthography in this release.
Reproduction and corrections: Downloads and licences · Coverage and held routes · Suggest a source-backed correction