Yi orJi (Ї ї; italics:Ї ї) is a letter of theCyrillic script. Yi is derived from the Greek letteriota withtwo dots.
It was the initial variant of the Cyrillic letterІ/і, which saw change from two dots to one in the 18th century, possibly inspired by similar Latin letter i. Later two variants of the letter separated to become distinct letters in the Ukrainian alphabet.
It is used in theUkrainian alphabet, thePannonian Rusyn alphabet, and thePrešov Rusyn alphabet of Slovakia, where it represents theiotated vowel sound/ji/, like the pronunciation of⟨yea⟩ in "yeast". As the historical variant of the Cyrillic Іі, it represented either /i/ (asi inpizza) or /j/ (asy inyen).
It was formerly also used in theSerbian Cyrillic alphabet in the late 1700s and early 1800s, where it represented the sound/j/; in this capacity, it was introduced byDositej Obradović but was eventually replaced with the modern letterј byVuk Stefanović Karadžić.[5][6]