The name "Otsil" is a forgotten Slavic "metallic" personal name, formed through the metaphorization of the term for steel or hardened iron. This name carries symbolic meaning, conveying wishes for strong health, strength, and firmness to a newborn boy.The lexeme "Otsil" and its related words, such as "otsilok" and "otsilka," were used in most Slavic languages, as well as in some neighboring non-Slavic languages, such as Hungarian and Romanian. Overall, the term "otsil" is an early borrowing from northern Italy for the Slavs.In Ukraine, the name "Otsil" was used until the end of the Middle Ages. For example, in 1436, a document records "Otsil pi(s) ou Vasluy," and in 1463, a gentleman named Otsil is mentioned in the city of Suceava. This name is also recorded in various forms in Poland, Romania, and Hungary. Among notable individuals with this name are the Hungarian writer Ase/Endre and the village Otselovo, which is mentioned in historical sources from 1434.