Quelesh

'''Ens. Quelesh' was a Scientist onboard the USS Intrepid'' (NCC-1738) in the late 23rd century. 

Early life before the Intrepid
Q was born on March 19, 2248 human calendar time on the planet Andoria.

Chronology

 * 2248: Q is born on planet Andor.
 * 2266: Q enters Starfleet Academy
 * 2270: Q graduates Starfleet Academy and promoted to Ensign, his first assignment is the Intrepid as a Scientist.