Where did the letter e come from?

Answer 1

The letter 'e' came from the English alphabet!

It also denotes a convenient contraction for the word 'electronic', as in 'email', 'egreeting card', 'eticket' (a hassle-free method of buying a train ticket from home introduced by the Indian Railways), etc.

Answer 2

Q is from the Q continuum, an all knowing, all seeing race. Omnipotent.