Which car manufacturer is named after the US market that it targets?

One possibility that comes to mind would be Scion, made by Toyota.

This article https://en.wikipedia.org/wiki/Scion_(automobile) indicates that the target market is Generation Y customers. The median age of Scion buyers is 39 years, the lowest in the industry.

The definition of Scion found at http://www.answers.com/topic/scion indicates a descendant or heir, thus implying a sense of youth (generation Y being the descendants or heirs of generation X).

Am I close?

Lexus.

"...the name has been attributed to the combination of the words "luxury" and "elegance," and another theory claims it is an acronym for "luxury exports to the U.S." According to Team One interviews, the name has no specific meaning and simply denotes a luxurious and technological image."

https://en.wikipedia.org/wiki/Lexus