The Aït Oussa (Arabic: أيت اوسا), is a large Adnani and Qahtani Arab tribe in Western Sahara and Morocco, the members of Ait Oussa are Sahrawis, descended from Banu Hilal and Banu Aws.
The Aït Oussa tribes speak Hassaniya Arabic,[8] and are Muslims, mainly belonging to the Maliki school of Sunni Islam.
[9] Hassan ibn Abdullah Afshil said: "Ait Oussa is a tribe of the Ansar, originally descended from migrants from the Arabian Peninsula, specifically from Medina.
"[10][11][12] The genealogist Muhammed bin Al-Tayeb Al-Bouchihi said: "This tribe consists of several clans, some of which have different lineages.
Some of its clans are Hilali Qays, others are Oussi Ansari, others are from Maqil"[13] In the absence of written local documents, oral tradition remains the only source for the (confirmation) origins (of Banu Aws) of the Ait Oussa tribe.