Commodore Chiv was a male Vulcan Starfleet flag officer who lived during the mid-23rd century. In 2259, he served as the Starfleet Commander representative on the judge's panel during the court martial of Illyrian Lieutenant Commander Una Chin-Riley. (SNW: "Ad Astra per Aspera")
Chiv was played by Eugene Clark.
Chiv's rank was determined by the size of stripe seen on his dress uniform epaulets, which are the same as those of Commodore Tafune.