The following is a list of characters are named Yvain (or a variation of Yvain), mentioned in Arthurian legend. The work(s)in which they appear are italicized.

Yvain li filz au roi Uriien; Ywain, Knight of the Round Table (based on the character of Owain mab Urien); Geoffrey of Monmouth's Historia Regum Britanniæ, protagonist in Chrétien de Troyes' Yvain, the Knight of the Lion, prose Lancelot, Tristan, and Vulgate Suite Merlin Yvain le Avoutres, Ywain the Bastard, Knight of the Round Table; Gawain's cousin Erec, Perceval, Suite Merlin, Lancelot, the Spanish Demanda, Tristan Yvain li filz al roi Herveu; may be the same knight as Hervis/Hernil de Rivel in Prose Lancelot, Vulgate Suite Merlin, Suite Merlin Yvain as Blanches Mains; Suite Merlin, Tristan, Lancelot, Malroy's Palamedes, Wauchier's Perceval, Demanda Yvain li Esclains; Lancelot, Suite Merlin Yvain de Cinel; Prose Lancelot, Suite Merlin, Vulgate Suite Merlin, Demanda Yvain de Cavaliot; Erec Yvain le rois de Lindezie; Le Biaus Desconëuz Yvain li Biaus; Rigomer Yvain li fiz a la Somiere; Rigomer Yvain la Noirs; Tristan, Palamedes Di Blonde Ywein; Torec Iwan Penelöi; Lanzelet Ivam de Canelones d'Alamanha; the Portuguese Demanda, Yvan de Nesguses de Baybola; the Spanish Demanda Ivains; the leader of the lepers in Béroul's Tristan

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