well-known (adj)

widely or fully known

"a well-known politician"; "well-known facts"; "a politician who is well known"; "these facts are well known"

long-familiar, well-known(a) (adj)

frequently experienced; known closely or intimately

"a long-familiar face"; "a well-known voice reached her ears"

well-known (Adjective)

Familiar, famous, renowned or widely known.

well-known (Adjective)

Generally recognised; reserved for some usual purpose.