What is "almarwani"

Banu Marwan a clan of Juhaynah "the people of manners". They are the leaders of Juhaynah tribe. Almarween are Sunni Tribe in the Arabian peninsula. There is no official tribe population count but it is estimated to be approximately one million in Saudi Arabia. The tribe Chief, Sheikh. Awdah bin Hamad ALMarwani ALJehani. The tribal lands extend from the Red Sea coast in Yanbu (Western Part of Saudi Arabia) to the heart of Najd in the central region of Saudi Arabia, and from North lands extend from Madinah (a holy city for Muslims) to Al Qunfudhah in the south.The tribe's reach extends to other countries like Qatar and reported the tribe family tree, that one of their descendants is an American individual, who was born in early nineties to white American mother from Kyle, Texas and Saudi Arabian father, who was a student at Lamar university during the child birth, which happened that the father was the son of Almarwani tribe leader, which makes this child the grandson of the tribe leader. However, there is no reports found if the blood line was continued by this American member or not.