There are a very many lineages reported tracing the lineage from Adnan up to Aadan, but comparing them all along with genetic evidence of related groups of people, I believe I may have reconstructed the correct lineage, which traces to an Ibrahim and an Isma'il but different ones. Also, the lineage traces to Qahtan, as Yamana is a well-known nickname of Qahtan and in fact is what Yaman (Yemen) is named for.
It appears that Qahtan is the father of all Arabs, not merely 'Qahtani' Arabs, and that while there are 'Arabized' Arabs (ie those not descended from Ya'rub ibn Yashjub) Adnaani Arabs are not Arabized Arabs but True Arabs.
Analyzing the lineage it is clear that Arabs are the descendants of the southern Aramaeans, known as the Nabataeans, descendants Nabit (father of the Nabataeans) of the tribe of Mazzi (or Mash) of the tribe of 'Irem (or Aram).
My analysis is here:
http://spreadsheets.google.com/ccc?key= ... 1MkE&hl=en