Synonyms of well known in English:

well known


See definition of well known

adjective

1‘their behaviour conforms to fairly well-known principles’

SYNONYMS
familiar, widely known, popular, common, usual, everyday, customary, conventional, established
ANTONYMS

unknown, abstruse

2‘Wyatt was a member of a well-known family of architects’

SYNONYMS
famous, noted, notable, famed, prominent, renowned
distinguished, leading, eminent, illustrious, great, celebrated, acclaimed, esteemed, august, recognized, pre-eminent, important, of high standing, of distinction, of repute, considerable
ANTONYMS

obscure, unimportant, unsung