Hondamentalist
A person, or people in a family, who only own cars made by Honda, and reject even the thought of owning anything else. Their devotion to these cars is nothing short of fanatical.
Since they moved into the house next door ten years ago, Dave and Sally have owned a Prelude, a Civic and an Odyssey, and they currently own a CR-V and a Fit. They are truly Hondamentalists.