Sarpeid was a location in the Alpha Quadrant.
In 2293, Sarpeid's position in the Milky Way Galaxy was labeled in a star chart that was in Captain James T. Kirk's quarters aboard the USS Enterprise-A. (Star Trek VI: The Undiscovered Country, okudagram)
This location was only mentioned in writing.
According to deleted lines from the final draft script for TOS: "All Our Yesterdays" dated 12 December 1968, the name of the Sarpeidon natives was identified as "Sarpeids".