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Look up Ю or ю in Wiktionary, the free dictionary.

Cyrillic letter Yu
Unicode (hex)
majuscule: U+042E
minuscule: U+044E
Cyrillic alphabet
А	Б	В	Г	Ґ	Д	Ђ
Ѓ	Е	Ѐ	Ё	Є	Ж	З
Ѕ	И	Ѝ	І	Ї	Й	Ј
К	Л	Љ	М	Н	Њ	О
П	Р	С	Т	Ћ	Ќ	У
Ў	Ф	Х	Ц	Ч	Џ	Ш
Щ	Ъ	Ы	Ь	Э	Ю	Я
Non-Slavic letters
Ӑ	Ӓ	Ә	Ӛ	Ӕ	Ғ	Ҕ
Ӻ	Ӷ	Ԁ	Ԃ	Ӗ	Ӂ	Җ
Ӝ	Ԅ	Ҙ	Ӟ	Ԑ	Ӡ	Ԇ
Ӣ	Ҋ	Ӥ	Қ	Ӄ	Ҡ	Ҟ
Ҝ	Ԟ	Ԛ	Ӆ	Ԓ	Ԡ	Ԉ
Ԕ	Ӎ	Ӊ	Ң	Ӈ	Ҥ	Ԣ
Ԋ	Ӧ	Ө	Ӫ	Ҩ	Ҧ	Ҏ
Ԗ	Ҫ	Ԍ	Ҭ	Ԏ	Ӯ	Ӱ
Ӳ	Ү	Ұ	Ҳ	Ӽ	Ӿ	Һ
Ҵ	Ҷ	Ӵ	Ӌ	Ҹ	Ҽ	Ҿ
Ӹ	Ҍ	Ӭ	Ԙ	Ԝ	Ӏ
Archaic letters
Ҁ	Ѻ	ОУ	Ѡ	Ѿ	Ѣ	Ꙓ
Ꙗ	Ѥ	Ѧ	Ѫ	Ѩ	Ѭ	Ѯ
Ѱ	Ѳ	Ѵ	Ѷ	Ꙟ
List of Cyrillic letters
Cyrillic digraphs

[Not to be confused with Korean eo "어"]

Yu (Ю, ю) is a letter of the Cyrillic alphabet, representing either the combination /ju/ (a so-called iotated vowel) or /u/ after a palatalized consonant.

Apart from the form I-O, in early Slavonic manuscripts the letter appears also in a mirrored form O-I (Ꙕ, ꙕ). It is this form that is probably the original, precisely displaying the Greek combination omicron-iota (οι). At the time that the Greek alphabet was adapted to the Slavonic language (giving rise to the Cyrillic alphabet), this denoted the close front rounded vowel /y/ in educated Greek speech. This digraphic representation of /y/ was so basic for speakers of Greek that the simple letter upsilon (υ) representing the same sound came to be called υ ψιλόν (y psilon) "simple" υ in contrast to "complex" οι.

Probably in analogy to the 'iotated' letters Ѥ, ІА, Ѩ and Ѭ, which fulfilled similar functions in Slavonic, this OI ligature was soon mirrored to the modern form ю.^{[citation needed]}