Question on the term hebrew

[FreeThinker619]

why are they named such and how much does the bible play in why they are named such ?

 

[Zardoz]

Abraham was the first Hebrew, which means to cross over, as he crossed over the Euphrates river and left his people and land to seek a relationship with G-d; as the land he left was full of idols.

 

[Shermana]

Some believe, and there is some Jewish midrash I believe on this, that it comes from descendents of Eber, who is a predecessor of Abraham.

http://en.wikipedia.org/wiki/Eber