an Entity references as follows:
The Umayyad Caliphate (661–750 CE; UK: /ʊˈmaɪjæd, uːˈ-/, US: /uːˈmaɪ(j)əd, -aɪæd/; Arabic: ٱلْخِلَافَة ٱلْأُمَوِيَّة, romanized: al-Khilāfah al-ʾUmawīyah) was the second of the four major caliphates established after the death of Muhammad. The caliphate was ruled by the Umayyad dynasty (Arabic: ٱلْأُمَوِيُّون, al-ʾUmawīyūn, or بَنُو أُمَيَّة, Banū ʾUmayyah, "Sons of Umayyah"). Uthman ibn Affan (r. 644–656), the third of the Rashidun caliphs, was also a member of the clan. The family established dynastic, hereditary rule with Muawiya ibn Abi Sufyan, long-time governor of Greater Syria, who became the sixth caliph after the end of the First Fitna in 661. After Mu'awiyah's death in 680, conflicts over the succession resulted in the Second Fitna, and power eventually fell into the hands of Mar