So we have a car. It’s purple and so, obviously, her name is Kumi.
Okay so maybe not obviously but it certainly made sense in our heads. Perhaps this will help: Japan + Purple = Kumi?
Fine, I’ll try using smaller sentences; Kumara are purple. The car is purple. Kumi is a contraction of Kumara. The car is purple. Kumi is a Japanese name. The car is Japanese. Kumi seems to fit the car. The car is still purple. Therefore, Kumi.
Sometimes explaining things makes it worse, not better.