De Ortu Waluuanii Nepotis Arturi (English: The Rise of Gawain, Nephew of Arthur) is an anonymous Medieval Latin chivalric romance dating to the 12th or 13th century. It describes the birth, boyhood deeds, and early adventures of King Arthur's nephew, Gawain. The romance gives the most detailed account of Gawain's early years of any contemporary work, and is driven by the young man's quest to establish his identity. It is also notable for its early reference to Greek fire.