Kaghvagh son of Kyrosh was a Klingon officer within the Klingon Empire.
In 2364, he represented the Empire in a secret meeting held by Spock and Sarek in an asteroid in the Romulan Neutral Zone to discuss the recent destruction of Romulan outposts along the Neutral Zone. He was accompanied by his pet targ. (TOS - Vulcan's Soul novel: Exodus)