According to tradition, Heber was also the name of one of Magog's descendants who were supposed to have occupied the Iberian peninsula, and Ireland (Hibernia) giving their name to each of them. According to Greek legend (?from Dionysius Periestis's comments on Hesperides), Iberians were actually refugees from Atlantis (thus according to Plato related to the first dynasties to rule Egypt). None of this can be reconciled with the Biblical narratives which maintain that Heber was the patriarch of all Hebrews and a grandchild of Arphaxad, son of Shem, unless the Hebrews were of a Magogite Maternal line and a Arphaxad paternal line. On the other hand, the legend that Avars might have originally been Caucasus Hebrews with Abraham's third wife Keturah in their ancestry does not fit with biblical traditions.
In the Quran, Heber is known as Hud and thus Hebrews are refered to as Eldhyn Hudwe (those of Hud).