And pretty quickly a majority of Muslims weren't Arabs, which made it pretty easy for them to overthrow the Umayyads, which they did in 750 CE. Another replacement is the Abbasids. Abbasids? Hold on. Abbasid or Abbasid. Ah, I'm right twice! Right, so the Abbasids were from the Abbasi, or Abbasi family, which hailed from one of the eastern and therefore more Persian provinces of the Islamic Empire.