
1) Latin boy name
Found on
https://www.crosswordclues.com/clue/callistus

patriarch of Constantinople, theologian, and hagiographer, an advocate of a Byzantine school of mystical prayer that he upheld by the authority of ...
Found on
http://www.britannica.com/eb/a-z/c/9

Callistus is a genus of beetles of the ground beetle family, Carabidae, represented by a single species in Britain and Europe, Callistus lunatus, which ranges from 4 to 7 mm in length, and is to be found on warm, dry, chalky hillsides. In Britain the species is very rare, and is restricted to a few locations around London.
Found on
http://www.probertencyclopaedia.com/browse/BC.HTM
No exact match found.