know as is a verb meaning "assign a specified (usually proper) proper name to". It carries 2 recorded senses.
look on as or consider
“she looked on this affair as a joke”
“He thinks of himself as a brilliant musician”
“He is reputed to be intelligent”
Definitions, synonyms and semantic relations for know as come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.