Abd Shams ibn Abd Manaf, founder of Banu 'Abd Shams

Abd Shams was the oldest son of Abd Manaf ibn Qusai.[1] His younger brothers were Muttalib, Nawfal and Hashim, after whom the Banu Hashim clan was named.[2]

Atikah was wife of Abd Manaf ibn Qusai. The birth of her conjoined twin sons 'Amr (more commonly known as Hashim) and 'Abd Shams was remembered for 'Amr being born with one of his toes pressed into 'Abd Shams's forehead. It was said that they had struggled in the womb seeking to be firstborn. Legend says that their father Abd Manaf ibn Qusai separated the conjoined brothers with a sword and that some priests believed that the blood that had flown between them signified wars between their progeny (confrontations did occur between Banu al'Abbas and Banu Ummaya ibn 'Abd Shams in the year 750 AH).[1][2]

Progenitor of Banu 'Abd Shams (Banu Umayyah) Tribes

Source: http://en.wikipedia.org/wiki/%27Abd_Shams