Hejaz
Historically, the Hejaz has always seen itself as separate from the rest of Saudi Arabia. The Hejaz is the most populated region in Saudi Arabia; 35% of all Saudis live there. Hejazi Arabic is the most widely spoken dialect in the region. Saudi Hejazis are of ethnically diverse origins.
Sudanese Arabs
Sudanese Arabs are the majority population of Sudan. They are predominantly Muslim and most of them speak the Sudanese Arabic dialect. The population of Sudan also includes various tribes who are genealogically Arabian, such as the Shaigiya,Ja'alin, Shukria, Juhaynah,Rashaida, Sulaym etc. (according to Johann Ludwig Burckhardt, the Bedouins of the eastern desert of Sudan, such as the Ja'alin and Shaigiya are almost indistinguishable from the Bedouins of eastern Arabia).