I'm not going to waste time illustrating the dull family tree of Abraham's brother, found in Genesis 22:20-24. Hardly any of the people listed are ever even mentioned again in the bible, and the only purpose of the next four verses is to tell you where Rebekah came from.
Starting off, Abraham's older brother Nahor married Milcah (his niece). The bible declares aunt-to-nephew marriages as detestable in Leviticus 18:14, but never says anything about an uncle marrying his niece. How lucky for Nahor!
So, Milcah gives birth to Huz, Buz, Kemuel, Chesed, Hazo, Pildash, Jidlaph, and Bethuel. Of these goofy names, only Bethuel is worth mentioning because he ends up being the father of Rebekah.
Nahor, being the respectable family man that he was, also had a concubine on the side, named Reumah. He knocked her up to get at least four sons: Tebah, Gaham, Thahash, and Maachah. None of whom are ever mentioned again in the bible. This alerts us to another one of the bible's less talked about lessonsóchildren who are not the product of a manwhore's wife are useless vermin who will never amount to anything. Remember kids, if you're a bastard, you might as well kill yourself.