The Kingdom of Yamma was a small kingdom located in what is now Ethiopia. It lay in the angle formed by the Omo and the Jimma Gibe Rivers; to the west lay the Kingdom of Jimma and to the south the Kingdom of Garo. Three mountains — Mount Bor Ama, Mount Azulu and Mount Toba — all distinguish the location of the former kingdom. This kingdom is also known as Janjero. However, this an Amharic exonym that Yem people who inhabit the present-day site of this kingdom consider pejorative. The Yem people who inhabit the present day site of the Kingdom of Yamma have been subject to prejudice from other Ethiopians, and in the past some Yem speakers have expressed discomfort speaking their own language for fear of negative judgement. The ISO 639-3 system for assigning standardized codes to languages has faced criticism for perpetuating the use of the term Janjero despite its prejudicial origin; the Yem language is coded as jnj as opposed to a mnemonic derived from the preferred name of the language. Overview Although one of the Sidamo kingdoms, until its conquest in 1894 Yamma was "isolated, and had little to do with its neighbors, its rivers being very difficult to cross. Although first visited by Europeans in 1614, until the late 1950s this region remained poorly known to outsiders. As a result, its people were said to have preserved a number of "customs so barbarious and strange that there cannot be any more so." Some of these alleged customs are as follows: The king had the right to take persons of either sex from their homes to either be sold into slavery, or to work for him. Maize had been grown in Yamma prior to the late 19th century, but a king forbade its further cultivation because "the cobs were better covered than he, and the 'beards' were like human hair." Human sacrifice was allegedly practiced until the Ethiopian conquest. If a man was wounded in war, his relatives killed him to prevent it being said that he died at the hands of the enemy. When a new king came to the throne, all victims of leprosy and ringworm were sought out and taken to a "hospital" on the other side of the Jimma Gibe River, where they were beheaded. History Yamma is first mentioned in a victory song of Yeshaq I, as one of several