toponymy
noun
to·pon·y·my tə-ˈpä-nə-mē 
tō-
: the place-names of a region or language or especially the etymological study of them
toponymist
tə-ˈpä-nə-mist
noun tō-
Example Sentences
Recent Examples on the Web That is part of a much broader quest to excavate (or invent) an older and more precise toponymy of urban neighborhoods. 
Henry Grabar, Slate Magazine, 25 July 2017
Henry Grabar, Slate Magazine, 25 July 2017 Word History
Etymology
International Scientific Vocabulary, from top- + Greek onyma, onoma name — more at name
First Known Use
1876, in the meaning defined above
- nonallelic
- nonallergenic
- nonallergic
- nonalphabetic
- nonaluminum
- nonambiguous
- nonamino
- nonanalytic
- nonanalytical
- nonanalytically
- nonanatomic
- nonanatomical
- nonanatomically
- nonane
- nonanimal
- nonanol
- nonanswer
- nonanswers
- nonantagonistic
- nonanthropological
- nonanthropologically
- nonanthropologist
- nonanthropologists
- nonantibiotic
- nonantibiotics