For my entertainment and your astonishment, I shall list them here in no particular order:
Brewer's Britain and Ireland, meaning of place names
Collins German Concise, German/English
Concise Dictionary of Old Icelandic, Geir T. Zoëga
Brewer's Dictionary of Phrase and Fable.
The New College Latin and English Dictionary
Collins Pocket French, French/English
Cassell's Latin Dictionary, Latin/English
The Pelican Rhyming Dictionary
A Concise Anglo Saxon Dictionary, J.R. Clark
Dictionary of Ecclesiastical Latin, Stelton
The Oxford Concise English Dictionary
The Oxford Latin Dictionary
and I use them all. Well, except that Rhyming Dictionary. It has been years since I looked at that one. Now you know.