Symmachus was the Dark Elven general of Tiber Septim's army who later became husband to Barenziah, Queen of Mournhold. Father to Helseth (born in 3E 376) and Morgiah (born in 3E 384 and named after Symmachus' mother).
Allegedly born the son of a poor miner in Mournhold, Symmachus left the city in his thirtieth year after both his parents were dead. He presumably had a personal grudge against the royal family of Mournhold. Later Symmachus joined the forces of Tiber Septim, took part in the Morrowind campaign and was granted a rank of General after the fall of Mournhold in late Second Era. When little Princess Barenziah and her nurse were found among the wreckage of the city, it was Symmachus who suggested to Emperor Tiber that the child might someday be valuable. Therefore Barenziah was placed with Count Sven Advensen, a loyal supporter who had recently retired from the Imperial Army to his fiefdom in Skyrim.
About a decade later, when teenage Princess Barenziah ran away from Count Sven's household, it was Symmachus again who had found her in the city of Riften. He took her into his custody, and informed her that she was to be reinstated as the Queen of Mournhold as soon as she turned eighteen. Then he escorted the Princess to the Tiber Septim's court in the Imperial City, where she had stayed until her adulthood. When Barenziah was eighteen, Symmachus led her to the city of Mournhold to be crowned as a new Queen. Gradually they came to love one another and were married and crowned in a splendid ceremony at which the Emperor himself officiated.
Symmachus reigned in Mournhold as a royal consort for centuries. Always loyal to the Empire, he had won many battles in the War of the Red Diamond against the supporters of Uriel III and Potema in 3E Second Century. During the Imperial Simulacrum in late Fourth Century, when civil unrest spread in Mournhold, Symmachus let Queen Barenziah take their young children and travel to the Imperial City to seek the ear of the Emperor Uriel VII, while he remained in Mournhold to deal with the grumbling peasants and annoyed nobility. Some days later he had fallen in battle with the revolting peasants.
When the plot of impostor Jagar Tharn was ruined, a rightful Emperor was restored and a tumultous period of Simulacrum has ended, a grand state memorial service was held for Symmachus at the Imperial City, befitting the man who had served the Septim Dynasty for so long and so well.