The story goes that all three Migos were related.  Quavo was the late Takeoff's uncle and Offset was Quavo's cousin.

It turns out the story is only half true.

Takeoff was Quavo's nephew.  However, in a new interview with Variety, Set reveals he is not Quavo's cousin.

Instead, he became really good friends with Qua in sixth grade and started hanging out with Takeoff through him.

The rest is rap history.