Is the 36 1 0 sneaker a Buick?

Yes, it was originally called Buick, then called Buick 36 1 degree, and finally ended up at 36 1 degree. This is a question of brand extension.

The reason is that it used to be called Buick and has no registered trademark. Later, a car Buick registered its trademark, so 36 1 degree was forced to change its name.