Lyonesse (disambiguation)

Lyonesse is a country in Arthurian legend.

Lyonesse or Lyoness may also refer to:


 * Lyonesse, an Arthurian character; see Lynette and Lyonesse
 * The Lyonesse Trilogy, a high fantasy trilogy by Jack Vance
 * Lyonesse, a fictional planet in the Foundation (book series) by Isaac Asimov
 * Lyonesse, a fictional underground kingdom of Deviants in Marvel Comics
 * SS Lyonesse, a ship built in 1889 for the ferry service between Penzance and the Isles of Scilly