I want to know the answer to the following question:
From whom was Marwan descended?
All the background I'm provided with is that "Two factions developed within Syria: the Confederation of Qays, who supported Ibn al-Zubayr, and the Quda'a, who supported Marwan, a descendant of Umayya via Wa'il ibn Umayyah.". Is that enough to answer the question?
Answer: yes