Amir Krause wrote:
As opposed to what Talon and many other Aikido students seem to believe, the name Aikido is not unique to the M.A. that where developed by Ueshiba. The name is a generic name for a group of M.A., it is true that the largest and most commonly available systems among those were developed by Ueshiba. But Ueshiba only adopted the name and can never change the fundamental meaning of it.
A couple of caveats:
1) Yes, it was a generic name for a division of the Butokukai, but that division, in practice, consisted of Morihei Ueshiba's art. Also, the Butokukai went belly up after the war.
2) Morihei Ueshiba does appear to be the first to have adopted that name as the name of his art (Minoru Hirai opened the Korindo dojo several years later).
3) Worldwide, 99% of practitioners of "Aikido" labeled arts trace themselves back to Morihei Ueshiba. So it shouldn't be unexpected that most people regard that usage as definitive.