those dont take on a life of their own like the legal name (legal fiction) though, that legal name, not only comes to life but is immortal in the same sense.
An egregore is a manifestation of a group consciousness, which can become powerful enough to take on a life of its own. It becomes driven by the collective (and often unintentional) willpower of large numbers of people.
it is said that the ancient egyptians used sounds and tones to bring things to life, a name has a sound and a tone.