Many Sith Lords refused to take the title of ‘Darth.’ Until now, there has been no official definition for the title in any canon literature or film. Unofficially, in an interview with George Lucas, he stated, “Darth” is a variation of “dark.”
The team over at Stupendous Wave have put together another great video. In this latest release, they dig deeper into Star Wars lore to find the true meaning of the Darth title.
Also check out: Why All Sith Lords Used Red Lightsabers After Darth Revan