onomasticon
/ˌɒnəˈmastɪkɒn/noun
A vocabulary or lexicon of (especially personal) proper names, usually presented in alphabetical order. In early use also: a list of nouns; a lexicon.
Origin
Early 18th century. From Hellenistic Greek ὀνομαστικόν book of names, vocabulary, use as noun (short for ὀνομαστικόν βιβλίον) of neuter singular of ancient Greek ὀνομαστικός onomastic.