623 in history

Born in 623

Mar 28 Marwan I the fourth Umayyad Caliph, and the cousin of Uthman ibn Affan, who took over the dynasty after Muawiya II abdicated in 684. Marwan's ascension pointed to a shift in the lineage of the Umayyad dynasty from descendants of Abu Sufyan to those of Hakam , both of whom were grandsons of Umayya. Hakam was also the uncle of Uthman ibn Affan