Alioth

The IAU catalogue's account

Ultimately from its pre-Islamic Arabian name al-jaun, "the Black Horse, or Bull," which became corrupted even in Arabic sources (where some of the corruptions carried other meanings). For example, in the Arabic manuscript of the Almagest that was translated into Latin in 1175 A.D., this name of ε UMa had apparently been miswritten as al-jauza or al-jauza (the latter being identical to the name for the Arabic Almagest period for Orion and Gemini). Whatever was read in this Arabic manuscript was transliterated into Latin as alioze. In subsequent Latin copies, this name was further corrupted to aliore, Alcor, Alioth, etc. Since late medieval times, "Alioth" became the preferred name for ε UMa.

Source language

Arabic

Reference

Kunitzsch, Paul; Smart, Tim (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations (2nd rev. ed.). Cambridge, Massachusetts: Sky Pub.

Source: IAU Catalog of Star Names (IAU-CSN), Working Group on Star Names. The account is the IAU's own text and is quoted in full: it is published under CC BY.