Abu Ya'za Yalannur b. Maymun (d. 1 Shawwal 572/2 April 1177) was a great Berber Sufi of the Masmuda/Haskura milieu, reported to be illiterate and Berber-monolingual; his epithet "Yalannur" is read as Berber for "possessor of light." As disciple of Abu Shu'ayb of Azemmour and master of Abu Madyan, he stands at the root of the western Maghrebi Sufi lineage. He is buried in the ribat he founded at Taghiya on Jabal Iruggan (today the town of Moulay Bouazza, Khenifra); the tomb and mosque were restored by Sultan Mawlay Isma'il in 1691, and an annual moussem is held. There is no dispute over the burial site; the given coordinate is the centre of the town that grew around the shrine (not tomb-specific). He has no standalone TDV entry but is cited as Abu Madyan's teacher in the "Ebû Medyen" entry. (Source: TDV Encyclopedia of Islam "Ebû Medyen"; Encyclopédie berbère, "Abū Yaʿzā", A. Faure.)