The Jelinians were a warp capable species native to the Delta Quadrant. Jelinian ale was an alcoholic beverage produced by the Jelinians.

A Jelinian freighter was trapped in the Void where, in 2377, its crew temporarily joined an alliance led by the USS Voyager to get the collective resources to escape the anomaly. However, the Jelinians and the Kraylor left the Alliance with Bosaal prior to the Alliance's escape. (VOY: "The Void")

This species was only mentioned in dialogue.
According to Star Trek: Star Charts (p. 95), there was a star system named Jelinia, which might possibly be the system of origin for this species, in the quadrant. The system's primary was an A-class star.