MT was firstly named
"Primitive Twisted Generalized Feedback Shift Register Sequence"
by a historical reason.
Makoto: Prof. Knuth said in his letter "the name is mouthful."
a few days later
Makoto:Hi, Takkun, How about "Mersenne Twister?"
Since it uses Mersenne primes, and it shows that it has its ancestor
Makoto:It sounds like a jet coaster, so it sounds quite fast,
easy to remember and easy to pronounce.
Moreover, although it is a secret, it hides in its name the initials
of the inventors.
Makoto:Come on, let's go with MT!
Later, we got a letter from Prof. Knuth saying
"it sounds a nice name."