There must have been some interchange between the Hawaiian islands and the japanese language -- many of the terminologies sound the same. Now if only I knew how "Spam Musubi" was coined.
Well, its a tough one.
So far on the list I have the ones mentioned: Kai, Kawaii, (and the conjunction)
Koyo (my stepfather suggested the name because it sounded Japanese and by coincidence actually a word relating to leaves)
My mother came up with "Masahiro" from an online japanese name site, (means big hero or something).