The Provisional Irish Republican Army, a group responsible for many of attacks in Northern Ireland during the conflict known as "the troubles," and is often referred to as "Provo" or "the Provos." This is why the Kia Provo hasn't gone down too well with British audiences. 

Likelihood of Being the Inspiration: 1 in 68,329,422, no marketing person would intentionally associate a new car with a group responsible for a number of car bombings.