Tristan the Younger[1] (Spanish: Tristán el Joven;[2] Italian: Tristano il giovane)[3] is a character[4] in both the 1534 Spanish edition (Don Tristan de Leonis y Don Tristan el Joven), and the translated 1555 Italian edition, of the romance of the Two Tristans.
In the narrative of the aforementioned books, he was the son of Tristan[5] and he was King of Leonis[6] or Liones,[7] both of which are in fact used in particular as names for Lyonesse.
[8] According to the late Italian Arthurian romance[9] I Due Tristani, he is the son of Tristan and Isolde and succeeds King Mark on the throne of Cornwall.
[14] The catalogue of Bernard Quaritch said that the second part of Due Tristani recounts the adventures of Ysaïe le Triste (from the 1522 French book of that name) under the name "Don Tristano il giovane".
[15] However, Entwistle said that Ysaïe le Triste had no effect on the body of Spanish literature relating to Tristan.