Iron King
In a Hungarian variant translated by Michel Klimo as "L'Oiseau de Feu", the hero is a poor farmer's youngest son, named Ladislas. His helper is a "ours d'argent" (silver bear). They quest for the firebird (which has been taking his father's flowers), the silver-maned horse from the "roi de fer" ("Iron King") and the daughter of the Fairy Queen.