1) Acknowledged 2) Agreed 3) Apprehended with certainty 4) Been acquainted with 5) Best-known 6) Better-known 7) Blog hosting service 8) Celebrated 9) Certain 10) Comprehended 11) Famed 12) Familiar 13) Famous 14) Far-famed 15) Generally recognised 16) Glorious 17) Identified 18) Illustrious 19) In the public eye 1) Acknowledged 2) Celebrated 3) Documented 4) Famed 5) Familiar 6) Famous 7) Fixed 8) Glorious 9) Heard of 10) Identified 11) Illustrious 12) Legendary 13) Noted 14) Recognizable 15) Recognized 16) Renowned 
• (p. p.) of Know • (p. p.) of Know.
Known past participle of Know . 
[adj] - apprehended with certainty
adjective apprehended with certainty; `a known quantity`; `the limits of the known world`; `a musician known throughout the world`; `a known criminal`