Notorious
late 15th century (in the sense ‘generally known’): from medieval Latin notorius (from Latin notus ‘known’) + -ous.
wiktionary
From Medieval Latin nōtōrius(“widely or fully known”), from nōtus(“known”), perfect passive participle of nōscō(“get to know”). First attested 1548. Negative sense appeared in the 17th century.
etymonline
notorious (adj.)
1540s, "publicly known and spoken of," from Medieval Latin notorius "well-known, commonly known," from Latin notus "known," past participle of noscere "come to know," from PIE root *gno- "to know." Middle English had notoire (mid-14c. in Anglo-French), from Old French, "well-known." Negative connotation, now predominant, "noted for some bad practice or quality, notable in a bad sense, widely but discreditably known" arose 17c. from frequent association with derogatory nouns. Related: Notoriously.
