In Roman mythology and religion, Quirinus ( /kwɪˈraɪnəs/;Latin: Quirīnus, [kʷɪˈriːnʊs]) is an early god of the Roman state. In Augustan Rome, Quirinus was also an epithet of Janus, as Janus Quirinus. His name may be derived from the Sabine word quiris "spear."
Quirinus is probably an adjective meaning "wielder of the spear" (Quiris, in the Sabine language, cf. Janus Quirinus). Other suggested etymologies are: (i) from the Sabine town Cures; (2) from curia, i.e. he was the god of the Roman state as represented by the thirty curies, first proposed by Krestchmer. A. B. Cook (Class. Rev. xviii., p. 368) explains Quirinus as the oak-god (quercus), and Quirites as the men of the oaken spear.
Quirinus was most likely a Sabine god of war. The Sabines had a settlement near the eventual site of Rome, and erected an altar to Quirinus on the Collis Quirinalis Quirinal Hill, one of the Seven hills of Rome. When the Romans settled in the area, the cult of Quirinus became part of their early belief system. This occurred before the later influences from the classical Greek culture.
In Plutarch's the Life of Romulus, he writes that shortly after Rome's founder had disappeared under what some considered suspicious circumstances, a Roman noble named Proculus Julius reported that Romulus had come to him in a vision. He claimed that the king had instructed him to tell his countrymen that he, Romulus was Quirinus. By the end of the first century BC, Quirinus would be considered to be the deified legendary king.