Real World article
(written from a Production point of view)

The Kelnaria region was a region of space.

In 2368, after the USS Enterprise-D delivered a consignment of chlorinide to the Mylaira system, the Federation starship would investigate subspace anomalies in this region. (TNG: "Ethics")

This region was mentioned in a starlog entry that was in the script for the episode; however, the entry was not in the final product. [1] This region may have been located in Sector 37628 where the Enterprise-D was scheduled to conduct a survey after its detour dropping off the survivors of the USS Denver.