least-known

Adjective

little-known (comparative less-known or lesser-known or littler-known, superlative least-known or littlest-known)

1. Not known about by many people.
   • The Misses Marie Deutsch and Ann Solomon are vacationing in that littlest-known part of the world—New York—and believing in the slogan of “See America First,” they started their vacation by visiting the Metropolitan Museum of Art....1927 September 15, “Vacations: Some Folks Are Away Now and Some Have Just Come Back”, in Albert Deane, editor, Pep-O-Grams, volume 3, number 11, New York, N.Y.: Paramount-Pep Club, page seven, column...

   Antonyms:

   well-known