Home U+0400 to U+04FF Cyrillic
Glyph for U+0451
Source: Noto Sans

U+0451 Cyrillic Small Letter Io

U+0451 was added in Unicode version 1.1 in 1993. It belongs to the block U+0400 to U+04FF Cyrillic in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Lowercase Letter and is mainly used in the Cyrillic script. Its uppercase variant is Glyph for U+0401 Cyrillic Capital Letter Io and its titlecase variant is Glyph for U+0401 Cyrillic Capital Letter Io.

The glyph is a canonical composition of the glyphs Glyph for U+0435 Cyrillic Small Letter Ie, Glyph for U+0308 Combining Diaeresis. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it is written from left to right. When changing direction it is not mirrored. The word that U+0451 forms with similar adjacent characters prevents a line break inside it.

The Wikipedia has the following information about this codepoint:

Yo, Jo or Io (Ё ё; italics: Ё ё; Russian pronunciation: [jɵ]) is a letter of the Cyrillic script. In Unicode, the letter ⟨Ё⟩ is named CYRILLIC CAPITAL/SMALL LETTER IO.

In English, the letter Yo is romanized using the Latin ë (according to the ALA–LC and British Standards), ë (yë word-initially) (BGN/PCGN) or yo/jo (orthographic transcription) for Russian, and as i͡o (ALA–LC), yo (BGN/PCGN), or ë (BSI) for Belarusian. In international systems, Yo is romanized as ë (ISO 9).

It was derived from the Cyrillic letter Ye (Е е).

Representations

System Representation
Nº 1105
UTF-8 D1 91
UTF-16 04 51
UTF-32 00 00 04 51
URL-Quoted %D1%91
HTML hex reference ё
Wrong windows-1252 Mojibake Ñ‘
HTML named entity ё
Encoding: EUC-KR (hex bytes) AC D7
Encoding: IBM866 (hex bytes) F1
Encoding: ISO-8859-5 (hex bytes) F1
Encoding: JIS0208 (hex bytes) A7 D7
Encoding: KOI8-R (hex bytes) A3
Encoding: KOI8-U (hex bytes) A3
Encoding: WINDOWS-1251 (hex bytes) B8
Encoding: X-MAC-CYRILLIC (hex bytes) DE
LATEX \cyrchar\cyryo
Adobe Glyph List afii10071
Adobe Glyph List iocyrillic
digraph io

Related Characters

Elsewhere

Complete Record

Property Value
Age (age) 1.1 (1993)
Unicode Name (na) CYRILLIC SMALL LETTER IO
Unicode 1 Name (na1) —
Block (blk) Cyrillic
General Category (gc) Lowercase Letter
Script (sc) Cyrillic
Bidirectional Category (bc) Left To Right
Combining Class (ccc) Not Reordered
Decomposition Type (dt) canonical
Decomposition Mapping (dm) Glyph for U+0435 Cyrillic Small Letter Ie Glyph for U+0308 Combining Diaeresis
Lowercase (Lower) ✔
Simple Lowercase Mapping (slc) Glyph for U+0451 Cyrillic Small Letter Io
Lowercase Mapping (lc) Glyph for U+0451 Cyrillic Small Letter Io
Uppercase (Upper) ✘
Simple Uppercase Mapping (suc) Glyph for U+0401 Cyrillic Capital Letter Io
Uppercase Mapping (uc) Glyph for U+0401 Cyrillic Capital Letter Io
Simple Titlecase Mapping (stc) Glyph for U+0401 Cyrillic Capital Letter Io
Titlecase Mapping (tc) Glyph for U+0401 Cyrillic Capital Letter Io
Case Folding (cf) Glyph for U+0451 Cyrillic Small Letter Io
ASCII Hex Digit (AHex) ✘
Alphabetic (Alpha) ✔
Bidi Control (Bidi_C) ✘
Bidi Mirrored (Bidi_M) ✘
Composition Exclusion (CE) ✘
Case Ignorable (CI) ✘
Changes When Casefolded (CWCF) ✘
Changes When Casemapped (CWCM) ✔
Changes When NFKC Casefolded (CWKCF) ✘
Changes When Lowercased (CWL) ✘
Changes When Titlecased (CWT) ✔
Changes When Uppercased (CWU) ✔
Cased (Cased) ✔
Full Composition Exclusion (Comp_Ex) ✘
Default Ignorable Code Point (DI) ✘
Dash (Dash) ✘
Deprecated (Dep) ✘
Diacritic (Dia) ✘
Emoji Modifier Base (EBase) ✘
Emoji Component (EComp) ✘
Emoji Modifier (EMod) ✘
Emoji Presentation (EPres) ✘
Emoji (Emoji) ✘
Extender (Ext) ✘
Extended Pictographic (ExtPict) ✘
FC NFKC Closure (FC_NFKC) Glyph for U+0451 Cyrillic Small Letter Io
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base) ✔
Grapheme Extend (Gr_Ext) ✘
Grapheme Link (Gr_Link) ✘
Hex Digit (Hex) ✘
Hyphen (Hyphen) ✘
ID Continue (IDC) ✔
ID Start (IDS) ✔
IDS Binary Operator (IDSB) ✘
IDS Trinary Operator and (IDST) ✘
IDSU (IDSU) 0
ID_Compat_Math_Continue (ID_Compat_Math_Continue) 0
ID_Compat_Math_Start (ID_Compat_Math_Start) 0
Ideographic (Ideo) ✘
InCB (InCB) None
Indic Mantra Category (InMC) —
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
Jamo Short Name (JSN) —
Join Control (Join_C) ✘
Logical Order Exception (LOE) ✘
Math (Math) ✘
Noncharacter Code Point (NChar) ✘
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) No
NFKC Casefold (NFKC_CF) Glyph for U+0451 Cyrillic Small Letter Io
NFKC Quick Check (NFKC_QC) Yes
NFKC_SCF (NFKC_SCF) Glyph for U+0451 Cyrillic Small Letter Io
NFKD Quick Check (NFKD_QC) No
Other Alphabetic (OAlpha) ✘
Other Default Ignorable Code Point (ODI) ✘
Other Grapheme Extend (OGr_Ext) ✘
Other ID Continue (OIDC) ✘
Other ID Start (OIDS) ✘
Other Lowercase (OLower) ✘
Other Math (OMath) ✘
Other Uppercase (OUpper) ✘
Prepended Concatenation Mark (PCM) ✘
Pattern Syntax (Pat_Syn) ✘
Pattern White Space (Pat_WS) ✘
Quotation Mark (QMark) ✘
Regional Indicator (RI) ✘
Radical (Radical) ✘
Sentence Break (SB) Lower
Soft Dotted (SD) ✘
Sentence Terminal (STerm) ✘
Terminal Punctuation (Term) ✘
Unified Ideograph (UIdeo) ✘
Variation Selector (VS) ✘
Word Break (WB) Alphabetic Letter
White Space (WSpace) ✘
XID Continue (XIDC) ✔
XID Start (XIDS) ✔
Expands On NFC (XO_NFC) ✘
Expands On NFD (XO_NFD) ✔
Expands On NFKC (XO_NFKC) ✘
Expands On NFKD (XO_NFKD) ✔
Bidi Paired Bracket (bpb) Glyph for U+0451 Cyrillic Small Letter Io
Bidi Paired Bracket Type (bpt) None
East Asian Width (ea) ambiguous
Hangul Syllable Type (hst) Not Applicable
ISO 10646 Comment (isc) —
Joining Group (jg) No_Joining_Group
Joining Type (jt) Non Joining
Line Break (lb) Alphabetic
Numeric Type (nt) none
Numeric Value (nv) not a number
Simple Case Folding (scf) Glyph for U+0451 Cyrillic Small Letter Io
Script Extension (scx)
Vertical Orientation (vo) R