Jlinzegh' province was a region on planet Don'zali IV, an agricultural colony of the Klingon Empire. K'zeq, a former commander of a prison facility, relocated to Jlingzegh' province after retiring from military service sometime after 2279. Koloth, along with James T. Kirk and Hikaru Sulu tracked K'zeq there in 2287, seeking information about Federation prisoners he had kept. (TOS novel: In the Name of Honor)