little-known

little-known (not comparable)

1. Not known about by many people.
   • 1951 Februry, K. Westcott Jones, “Some Australian Railway Byways”, in Railway Magazine, page 117:

     Some little-known lines belonging to the State exist in the extreme south-west corner of Western Australia, to serve the timber country.

   • 2013 October 9, “Battersea Power Station ‘at risk’”, in The Times‎, →ISSN, →OCLC, archived from the original on 11 April 2021‎:

     Battersea Power Station is among a host of world monuments that have been placed on a list of threatened heritage. It is one of 67 cultural sites in 41 countries deemed to be at risk from the forces of nature and social, political and economic change.
     They range from Venice to the little-known village of Pok Fu Lam in Hong Kong, and include sites dating from prehistory to the twentieth century.

   • 2022 January 12, “Network News: More Secrets of the Underground”, in RAIL, number 948, page 19:

     London Transport Museum's Siddy Holloway and rail historian and RAIL contributor Tim Dunn will reunite to discover more hidden sites and little-known stories from the Tube.

Also separable - "he is little known in this country"

• well-known

• lesser-known