January is the name of the first year of the month. It comes from Roman cognomen Januarius meaning “January” from Latin ianus meaning “archway, covered passageway” derived from Proto-Indo-European *h₁ey- (to go). Januarius gets its name from the Roman god Janus, who was the god of doorways, transitions, and beginnings, depicted with two heads- one looking forward and the other backward, looking to the future and to the past.

Nicknames: Jan

Origin: Proto-Indo-European




  • Januarius (Ancient Roman)
  • Janvier (French)
  • Gennaro (Italian)
  • Ianuarius (Ancient Roman)
  • Janus (Latin)
  • Ianus (Latin)
  • Jenaro (Spanish)


Female forms:

  • Gennara (Italian)


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