Adnan (Arabic: عدنان, romanized: 'adnān)

 Is the traditional ancestor of the Adnanite Arabs of Northern, Western, Eastern and Central Arabia, as opposed to the Qahtanite Arabs of Southern Arabia who descend from Qahtan. His ancestry can be traced back to Abraham and from there upto Adam.

Origin:
 According to tradition, Adnan is the father of a group of the Ishmaelite Arabs who inhabited West and Northern Arabia; he is a descendant of Ishmael, son of Abraham. Adnan is believed by genealogists to be the father of many Ishmaelite tribes along the Western coast of Arabia, Northern Arabia and Iraq. Many family trees have been presented by Adnan, which did not agree about the number of ancestors between Ishmael and Adnan but agreed about the names and number of the ancestors between Adnan and the Islamic prophet Muhammad.
 
The overwhelming majority of traditions and Muslim scholars state that Adnan is a descendant of Qedar the son of Ishmael,[except for Ibn Ishaq who claimed that Adnan was a descendant of Nebaioth; this confusion of Ibn Ishaq can be because one of the descendants of Kedar was also named "Nebaioth".Most Muslim scholars refused any attempt to recite the ancestors between Adnan to Ishmael, and condemned other scholars such as Ibn Ishaq for doing it.
 
 
https://en.wikipedia.org/wiki/Adnan