Origin: L < nomen, name + calator, caller, crier < pp. of calare, to call: see clamor
See nomenclator in American Heritage Dictionary 4
Origin: Latin nōmenclātor, a slave who accompanied his master to tell him the names of people he met
Origin: , variant of nōmenculātor
Origin: : nōmen, name; see nō̆-men- in Indo-European roots
Origin: + calātor, servant, crier (from calāre, to call; see kelə-2 in Indo-European roots).