RBMS/BSC Latin Place Names File - Locations from the imprints of books before 1801 and their vernacular equivalents (Brigham Young University). - http://lib.byu.edu/~catalog/people/rlm/latin/names.htm
Cathedral Libraries Catalogue: Names of Printing Towns - English forms for the Latin names of printing towns as found in early printed books. There are also some references for early spellings of vernacular forms of names. - http://www.bibsoc.org.uk/cathlibs/towns/
Latin Names of Places - A list for Great Britain and Ireland. - http://www.ipa.net/~magreyn2/recint2.htm
Orbis Latinus - List of City Names - A digitization of the original work of Dr. Johann Grässe (1909), reflecting the geographical and political reality of that time (Columbia University). - http://www.columbia.edu/acis/ets/Graesse/contents.html