Umayyad Caliphate
According to tradition, the Umayyad family (also known as the Banu Abd-Shams) and the Islamic Prophet Muhammad both have a common ancestor, Abd Manaf ibn Qusai.  Muhammad descended from Abd Munaf via his son Hashim, the Umayyads descended from Abd Munaf via a different son, Abd-Shams. The two families are therefore considered to be different clans (those of Hashim and of Umayya, respectively) of the same Arabian tribe (that of the Quraish).