Onomastics originates from the Greek (onomastikós), which translates to "of or belonging to naming", from (ónoma) meaning "name".Toponymy or toponomastics, the study of place names, is one of the principal branches of onomastics. Anthroponomastics is the study of personal names. Onomastics can be helpful in data mining, with applications such as named-entity recognition, or recognition of the origin of names. It has also been used in historical research to identify ethnic minorities within wider populations.Literary onomastics is the branch that researches the names in works of literature and other fiction. An orthonym is the proper name of the object in question, the object of onomastic study.