U+0439 was added to Unicode in version 1.1 (1993). It belongs to the block Cyrillic in the Basic Multilingual Plane.

This character is a Lowercase Letter and is mainly used in the Cyrillic script. It is related to its uppercase variant Й and its titlecase variant Й.

The glyph is a Canonical composition of the glyphs и ̆. It has a Ambiguous East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. The glyph can, under circumstances, be confused with 2 other glyphs. In text U+0439 behaves as Alphabetic regarding line breaks. It has type Lower for sentence and ALetter for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

For the sound in English sometimes represented by ĭ, see near-close near-front unrounded vowel.

Short I (Й й; italics: Й й) is a letter of the Cyrillic script. It is made of the Cyrillic letter И with a breve.

Short I represents the palatal approximant /j/, like the pronunciation of ⟨y⟩ in toy.

It is transliterated as ⟨j⟩ (used amongst European languages), ⟨y⟩ (the most common), or ⟨i⟩ (the least common, likely to be ĭ), depending on which romanization system is used. See Transliteration of Russian into English and Romanization of Ukrainian.


System Representation
UTF-8 D0 B9
UTF-16 04 39
UTF-32 00 00 04 39
URL-Quoted %D0%B9
HTML-Escape й
Wrong windows-1252 Mojibake й
HTML-Escape й
digraph j=
LaTeX \cyrchar\cyrishrt
Encoding: EUC-KR (hex bytes) AC DB
Encoding: IBM866 (hex bytes) A9
Encoding: ISO-8859-5 (hex bytes) D9
Encoding: JIS0208 (hex bytes) A7 DB
Encoding: KOI8-R (hex bytes) CA
Encoding: KOI8-U (hex bytes) CA
Encoding: WINDOWS-1251 (hex bytes) E9
Encoding: X-MAC-CYRILLIC (hex bytes) E9

Related Characters

  • Й


  • ѝ
  • ҋ


Complete Record

Property Value
Age (age) 1.1
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) и ̆
Lowercase (Lower)
Simple Lowercase Mapping (slc) й
Lowercase Mapping (lc) й
Uppercase (Upper)
Simple Uppercase Mapping (suc) Й
Uppercase Mapping (uc) Й
Simple Titlecase Mapping (stc) Й
Titlecase Mapping (tc) Й
Case Folding (cf) й
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Bidi Paired Bracket (bpb) й
Bidi Paired Bracket Type (bpt) None
Cased (Cased)
Composition Exclusion (CE)
Case Ignorable (CI)
Full Composition Exclusion (Comp_Ex)
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)
Dash (Dash)
Deprecated (Dep)
Default Ignorable Code Point (DI)
Diacritic (Dia)
East Asian Width (ea) Ambiguous
Extender (Ext)
FC NFKC Closure (FC_NFKC) й
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base)
Grapheme Extend (Gr_Ext)
Hex Digit (Hex)
Hangul Syllable Type (hst) Not Applicable
Hyphen (Hyphen)
ID Continue (IDC)
Ideographic (Ideo)
ID Start (IDS)
IDS Binary Operator (IDSB)
IDS Trinary Operator and (IDST)
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
ISO 10646 Comment (isc)
Joining Group (jg) No_Joining_Group
Join Control (Join_C)
Jamo Short Name (JSN)
Joining Type (jt) Non Joining
Line Break (lb) Alphabetic
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) й
NFKC Quick Check (NFKC_QC) Yes
NFKD Quick Check (NFKD_QC) No
Numeric Type (nt) None
Numeric Value (nv) NaN
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)
Pattern Syntax (Pat_Syn)
Pattern White Space (Pat_WS)
Quotation Mark (QMark)
Radical (Radical)
Sentence Break (SB) Lower
Simple Case Folding (scf) й
Script Extension (scx) Cyrillic
Soft Dotted (SD)
STerm (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) ALetter
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)