Tartar Sauce

I saw a History Channel program about Ghengis Khan the other day. He conquered the Tartars, which set me to wonder how Tartar Sauce got its name and what it might have to do with the Tartars. According to this source, it means "rough" in French, and Tartars were rough, nasty and violent types. Also, they ate shredded beef, sometimes raw, which is where Steak Tartare gets its name. Tartars took their name from Tartarus, the Greek version of hell.