The origin of the Jeep is complex, however, to determine how it was named, one needs a scorecard to keep track of all the twists and turns. There are several proposed theories about where the word jeep began.

The first is that jeep is slang for” GP” or “General Purpose”. According to this theory, GIs shortened the acronym GP to “jeep”. It isn’t this simple. The government used the code “G” plus a numerical designation on vehicles to denote their type, not their purpose, and Jeeps were highly specialized pieces of equipment and not general purpose vehicles.
Neither American Bantam nor Willys label their vehicles GP, however, Ford did. The G stood for government, P designated the wheelbase, and the W stood for Willys because they supplied the engine. So, although the first theory sounds plausible, it is unlikely that this is the name’s origination.

The second theory is that the Jeep is named for a popular cartoon character. During the 1930s, E.C. Segar created the Popeye comic. One of the characters featured was Eugene the Jeep. As the story goes, Popeye received a gift from his friend, the Maharaja of Taja. It was Eugene, a small yellow animal able to go anywhere (walk through walls, travel to other dimensions). The only word Eugene spoke was “Jeep”. GI’s during WWII had access to this comic series, and the new vehicle that they drove could seemingly go anywhere just like Eugene, so GI’s called it a Jeep.

The third theory, and one that is a bit more credible, is that the word was invented during WWI. Back then, before the vehicle was ever built, the term “jeep” meant something unproven, insignificant, untested, or fresh. It was often used to describe a new recruit. Today, we use the word “rookie”. So, it isn’t out of the realm of possibility that this new and untested vehicle was also nicknamed a jeep.

Finally, the last theory does have historical roots. In 1941, a Jeep was driven up the stairs at the Capitol to demonstrate the vehicle’s capabilities. The driver was “Red” Hausmann, and when asked what the vehicle was, he responded, “It’s a Jeep.”

The name Jeep is a registered trademark. Willys-Overland filed for the trademark in 1943, and the rights were officially registered in 1950. Over the decades, as the company changed hands, the trademark was passed on. It is now owned by Stellantis and its subsidiary, FCA US LLC, manages the brand’s intellectual property. So, no matter how the name came into being, Jeep has come to designate one of the most popular motor vehicles sold today.