One would need to consult the Quenta Aikimarillion in order to determine the origin of the many and varied Styles of Middle Earth Aikido.
The Music of the Uchi-Deshi
There was Ueshiba, the One, who in Aiki-world is called O'Sensei; and he made first the Uchi-Deshi, the Holy Ones, that were the offspring of his thought, and they were with him before aught else was made. And he spoke to them, propounding to them themes of Ki extension; and they trained before him, and he was glad. But for a long while they trained only each alone, or but a few together, while the rest watched; for each comprehended only that part of the mind of the O'Sensei from which he came, and in the understanding of their brethren they grew but slowly. Yet ever as they trained they came to deeper understanding of budo, and increased in unison and harmony."
Tell me that J.R.R. Tolkien was not secretly an aikidoka