The first English language version of Dragon Ball might be its most obscure. Frontier Enterprises, a recording studio based in Tokyo, Japan that operated in the 1970/80s in Japan and specialized in English versions of film, allegedly produced something for Akira Toriyama's franchise. The only reference to this dub comes from Dick Nieskens, a voice actor who worked for the company in the 80s.
I've spoken to him about this mysterious Dragon Ball dub, but unfortunately it's been so long that he doesn't really remember much about it. He's claimed it was a Dragon Ball Z production, though that doesn't match up with his timeline. He says he left Japan for Hong Kong by 1988, which would've been a year before Dragon Ball Z began its television run in Japan. I suspect it was a dub of the first Dragon Ball movie (Frontier only worked on movies) but without a confirmation of which film it's hard for me to justify writing an article about it.
Frontier's dubs were primarily used on airlines, so I really don't know how this could resurface.