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Across the world, Iacha (Яша , Iacha , Иаша ) is quite a rare dominantly boy's, but infrequently girly forename. The forename Iacha is characteristic of Kazakhstan, where it is quite a rare male name, Kyrgyzstan, where it is quite a rare predominantly boy's, but very seldom girly name, and Russia, where it is a rare male name. In absolute terms, it most frequently occurs in Russia, Kazakhstan, and the Democratic Republic of the Congo. Much less frequently, Iacha is the last name as well as the forename.
Iacha is also a name for the fictitious and mythical characters: James, son of Alphaeus , the one of the Twelve Apostles of Jesus Christ; Yasha , the character in the play "The Cherry Orchard"; Генерал Яков Михайлович Аносов , character in The Bracelet of Garnets; Dr Jacob Freudstein , the horror movie character, The House by the Cemetery and Jacob , the character from Pete's Dragon, among other works.