Isn't Rebecca the Daughter of a Nahor?

Jacob is the grandson of a avraham, which i find sor so interesting. Like everything's kind of going really good until you get to jacob and a nahors family line,. You see the same thing. They go to the other kind of side of the family of tira. And we haven't really talked about it yet, but he kind of seems to mess up the story of god's people.