G'lyndr was a powerful clan on planet Xenex, and a long-time rival of Clan Calhoun.

"G'lyndr" was also used as the title for the leader of the clan (i.e. "G'lyndr of G'lyndr"). As of 2354, V'rdan of G'lyndr was the clan leader. (NF short story: "A Lady of Xenex")

There is presumably also a city G'lyndr on Xenex, much as the city Calhoun exists as home of Clan Calhoun; however, this is not explicitly stated in the story.

the planet Xenex
Argive • Calhoun • G'lyndr • The Pit • Moute • Vedrine