Vulcan mythology before the Time of Awakening included a number of different gods, such as the od of War, the God of Death, and the God of Peace. Typically, the God of War and the God of Death are depicted together on artifacts but never with a third glyph. An exception is on the Stone of Gol, where the symbols of the two gods were separated by the God of Peace. (TNG: "Gambit, Part II") Vulcan mythology stated that all creation arose from a place known as Sha Ka Ree from their god Clav Setu. (Star Trek V: The Final Frontier)
The DVD commentary for "Amok Time" says that TOS writer D.C. Fontana named the Vulcan god of death "Shariel"; a bust of whom is seen in Spock's quarters.