>>36773532The initials in the names of all of EeVee's evolutions, when ordered alphabetically, range between E(speon) and V(aporeon); all the others are contained in between those two.
Additionally, within that range in the alphabet, there are 10 letters unused on a currently-existing eeveelution's initial (H, I, K, M, N, O, P, Q, R, T). For some reason, 10 is also the number of types that don't have an eeveelution of their own.
That thread sure was a wild ride.