The name of this species, and the quadrant that their homeworld was located in, was not identified in the episode, but instead comes from the final draft script of "Oasis", and a reference found at StarTrek.com.  The costumes for the Kantare also feature tags that state 'Kantare aliens'.
In the final draft script of "Oasis", the Kantare were at first merely described as "humanoid aliens." A later description referred to them as "a mix of men and women, of varying ages from thirties to sixties." For the first scene in which multiple Kantare appear (a crowd scene), precisely eighteen members of the species were scripted to be present.