"Volk" also means "people" in German, and the name "Foehn" itself is a German-originated word.
Don't forget about Uragan, someone must have named him in Russian. Volkov as the personality behind the AI makes a lot of sense already, since he is non-mind-controllable, a cyborg, one of the most experienced soldiers in the world (so he should be able to easily command the defense of the Last Bastion, especially using his flying subroutine "avatar"), and he is on the cover of the mod. If the Soviets do have a cyborg production plant hidden somewhere in the Urals and Volkov's command codes are stored there, it would be wise for Foehn to recover these.
With all the focus on Yunru, I wonder any one noticed I said at least one known named character.
Siegfried, Norio and Yunru could make sense as the survivors of the Antarctica disaster, leading the Last Bastion, Wings of Coronia and Haihead respectively. Though they would not be a part of their skirmish/multiplayer roster for obvious reasons.