Sergius was the name of a Roman Patrician Gens, Sergia (or Sergii), originally from Alba Longa (Latium in central Italy) and can refer to:
Sergius (or Serge) and Bacchus were fourth-century Roman Christian soldiers revered as martyrs and saints by the Catholic, Eastern Orthodox and Oriental Orthodox Churches. Their feast day is 7 October.
According to their hagiography, Sergius and Bacchus were officers in Galerius' army, and were held high in his favor until they were exposed as secret Christians. They were then severely punished, with Bacchus dying during torture, and Sergius eventually beheaded. However, due to its historical anachronisms, the hagiography is considered ahistorical.
Sergius and Bacchus were very popular throughout Late Antiquity, and churches in their honor were built in several cities, including Constantinople and Rome. The close friendship between the two is strongly emphasized in their hagiographies and traditions, making them one of the most famous examples of paired saints. This closeness led the historian John Boswell to suggest that their relationship was a romantic one; though other historians have widely rejected this theory, it has led to popular veneration of Sergius and Bacchus in the gay Christian community.
Metropolitan Sergius (secular name Georgiy Alexeyevich Tikhomirov, Russian: Георгий Алексеевич Тихомиров; June 16, 1871 – August 10, 1945) was a bishop of the Orthodox Eastern Church. He first served in Russia, but spent most of his episcopate in Japan (1908 - 1945) in the Russian Orthodox Christian mission and in the Japanese Orthodox Church.
He was born on June 16, 1871 as Alexiy in a village of Guzi near Novgorod, Russia, in the family of a rural priest Tikhomirov. He studied well, entered in the St. Petersburg Theological Academy and graduated in 1896. In 1895 Alexiy took the monastic vows with the name Sergius.
Later he taught theology at the St. Petersburg Theological Seminary, and in 1899 became the prefect of the St. Petersburg Theological Academy, in the rank of archimandrite.
In 1905 he was raised to episcopacy and was consecrated Bishop of Jamburg, vicar to the Archbishop of St. Petersburg, at the age of 35 years. Throughout his tenure at the Academy he was a prolific preacher as well as an author of a number of works on the Church history of his native Novgorod region.