Je (Ј ј; italics: Ј ј) is a letter of the Cyrillic script, taken over from the Latin letter J.[1]
It commonly represents the palatal approximant /j/, like the pronunciation of ⟨j⟩ in "hallelujah".
The Cyrillic letter ј was introduced in the 1818 Serbian dictionary of Vuk Stefanović Karadžić, on the basis of the Latin letter j.[1] Karadžić had previously used ї instead for the same sound, a usage he took from Dositej Obradović,[2] and the final choice also notably edged out another expected candidate, й, used in every other standard Slavic-language Cyrillic script.
An asterisk (*) means the language does not use the letter in its orthography anymore.
, 
: Cyrillic letter Je with belt
The dictionary definition of Ј at Wiktionary The dictionary definition of ј at Wiktionary