The Jowett Javelin predated the Gloster Javelin by a few years.
Trident was mentioned as a motorbike. There was also a Trident car company which rose from one of TVR's financial collapses. The car they built was the Trident Clipper - two aircraft in one car.
The Allard Clipper was an extremely ugly 3 wheeler.
SS Cars asked Armstrong Siddeley for permission to use the Jaguar name on their cars.