Noun
One who calls persons or things by their names.
One who gives names to things, or who settles and adjusts the nomenclature of any art or science; also, a list or vocabulary of technical names.
Source: Webster's dictionaryUnited States In 1842–1846 he issued his Nomenclator Zoologicus, a classified list, with references, of all names employed in zoology for genera and groups — a work of great labour and research. Source: Internet