The names Phobos and Deimos are extremely important too. Theos.com's description of their place in Greek mythology reads as such:

DEIMOS and PHOBOS were the gods or personified spirits (daimones) of fear. Deimos represented terror and dread, while his brother Phobos was panic, flight and rout. They were sons of the war-god Ares who accompanied their father into battle, driving his chariot and spreading fear in his wake. As sons of Aphrodite, goddess of love, the twins also represented fear of loss.

This all makes more sense considering there are actually two Model 401s in existence. Their registrations: N401XD (Deimos) and N401XP (Phobos). The warlike and downright scary nature of their names also alludes to the probability that they are designed for intensive military applications.

You have to hand it to Scaled Composites for coming up with such a rich and well-tailored mythological metaphor for the Model 401 program—a program of which we still don't know if there is an external benefactor or customer.