(Chuck posting -- no not POSING, Peter! -- as Emily again)
A historical note:
In Aikido Journal, Vol 21, No. 3 (1994), there's an interview with Minoru Hirai, then head of Nihon Korinkai Aikido (Anyone know, is he still alive?). Hirai was a contemporary of Uehiba's (born 1903) who trained in several koryu. He entered Ueshiba's Kobukan Dojo in 1939 and became its director of general affairs in '42, and was the Kobukan's representative to the Dai Nihon Butokukai.
According to the interview, conducted by Stan Pranin, Hirai was a major player in changing the name of Ueshiba's art to aikido.
He says: "'Aikido' rather than being a specifically selected name, was the term used to refer to 'Butokukai-ryu aiki budo' within the Dai Nihon Butokukai."
Apparently, Hirai was at the Butokukai in regards to a new section being formed to cover 'comprehensive' yawara/jujutsu systems.
'Aikido' was chosen by Hisatomi Tatatsuo, said Hirai, because is was inoffensive, stressed 'michi', and comprehensive. Hirai said: "... a cover-all term that could include others things as well."
Hirai is also credited with being functional in development of today's taihojutsu (police arrest tactics) originally taught during World War II.
Even while attending clases at Ueshiba's Kobukan, Hirai maintained his own dojo, founded before he met Ueshiba, in Okayama.