http://en.wikipedia.org/wiki/Jeep_CJ

The Jeep CJ (or Civilian Jeep) is a public version of the famous Military Jeep from World War II.

The first CJ prototype (the CJ-2) was introduced in 1944 by Willys, and the same basic vehicle stayed in production through seven variants and three corporate parents until 1986.

A variant of the CJ is still in production today under license. The last CJs, the CJ-7 and CJ-8, were replaced in 1987 by the Jeep Wrangler.

Production of the Willys MB, better known as Jeep, began in 1941, shared between Willys, Ford and American Bantam which had initiated the original Jeep body design. 8,598 units were produced that year, and 359,851 units were produced before the end of World War II. In total, 653,568 military Jeeps were eventually manufactured. The origin of the name "Jeep" has been debated for many years.

Some people believe "Jeep" is a phonetic pronunciation of the abbreviation GP, from "General Purpose", that was used as part of the official Army nomenclature. The first documented use of the word "Jeep" was the name of a character Eugene the Jeep in the Popeye comic strip, known for his supernatural abilities (e.g., walking through walls).

Eugene the Jeep is a character in the Popeye comic strip. A mysterious animal with magical abilities, the Jeep first appeared in the March 16, 1936

It has been theorized that the Jeep vehicle was named after this character: soldiers in World War II may have nicknamed the machine after the then-popular character because they shared an ability to go anywhere

http://en.wikipedia.org/wiki/Willys

Jitney (U.S. and Canada)
A jitney is a North American English term which originally referred to a livery vehicle intermediate between a taxi and a bus.[5] It is generally a small-capacity vehicle that follows a rough service route, but can go slightly out of its way to pick up and drop off passengers. In many U.S. cities (e.g. Pittsburgh and Detroit), the term jitney refers to an unlicensed taxi cab.

The name jitney comes from an archaic, colloquial term for a five-cent piece in the US. The common fare for the service when it first came into use was five cents, so the five-cent cab or jitney cab came to be known for the price charged.