I must admit that I call mine the "H" or "The Truck". I think Tank would also be appropriate, but in a military sense, it reminds me more of a LAV25.
And of course, "Jeep Rescue Vehicle" always has a nice ring to it!
And an oak tree put to death??? Why do I suddenly envision quad-.50 calibers or under-hood mounted .12 gauge autos here.... WOOHOO!