a person who assigns names, as in scientific classification; classifier.
2.
Archaic. a person who calls or announces things or persons by their names.
Origin: 1555–65; < Latin nōmenclātor, variant of nōmenculātor one who announces names, equivalent to nōmenname + -culātor, variant of calātor a crier (calā(re) to call + -tor-tor)