This has been an interesting discussion, but how do these scripture fit in with that scenario?  Many of my ancestors over the past 20 generations (10 years research) have Hebrew first names, but they were believers in Jesus Christ also, at least most of them.  I would think that their heavenly heritage was through their belief in Jesus as opposed to whether they may or may not have had any "lost tribe" blood in their DNA.  Your thoughts?
 
Kay
 
P.S.  My birth father's surname was Testerman, but a couple of generations behind him their surname was TESTAMENT!  I love that part!!!
 
 
 1Ti 1:4Neither give heed to fables and endless genealogies, which minister questions, rather than godly edifying which is in faith: [so do].
 
 Tts 3:9¶But avoid foolish questions, and genealogies, and contentions, and strivings about the law; for they are unprofitable and vain.