What does Janus mean?
Janus \j(a)-nus\ as a boys' name is of Latin origin, and the meaning of Janus is "gateway". Janus was the Roman guardian of doors as well as of beginnings and endings. He had two faces, one of which looked forward and the other backward, and gave his name to the first month of the year, January. A Saint Januarius was martyred in the fourth century AD.
Janus is an uncommonly occurring given name for men but a very prominent surname for both adults and children (#16487 out of 88799, Top 19%). (2000 U.S. Census)
Displayed below is an analysis of the usage of the boy name Janus and corresponding names. The only prominent alternative form of Janus (#unlisted) appearing in the Top 1000 is Gennaro. Adoption of this boy name was at its apex during 1900-1909 and is now less. (2014 Birth Statistics)
Janus is pronounced similarly to Janos, Jonas▲ and Junius▼. Other suggested similar baby names are James, Janak, Jancsi, Janek, Janesh, Janko, Janse, Jens, Jones▼ and Manus. These names tend to be more commonly used than Janus.