Toponymy is the study of place names (toponyms), their origins, meanings, use, and typology.|
Toponym is the general name for any place or geographical entity. Related, more specific types of toponym
include hydronym for a body of water and oronym for a mountain or hill.
A toponymist is one who studies toponymy,
see the article on Wikipedia
The majority of Saxon words are taken from 'A Dictionary of the Anglo-Saxon language by Rev J Bosworth(1838)' available
from Google Books and now online at www.bosworthtoller.com (a massive achievement).