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Last name Januarius (Januar
, Januarius
, Януарий
) , around the world, is a common cognomen. The family name Januarius is habitual in South-eastern Asia, particularly Indonesia, where it is quite a common surname, Malaysia, where it is a rare surname, and Singapore. In absolute terms, this name is the most popular in Indonesia, Malaysia, and Japan. Also, Januarius is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Januar | Philippines, Malaysia, India, Japan, Indonesia |
| Januarius | Philippines, Malaysia, Nigeria, Indonesia, Kenya |
| Януарий | Russia, Ukraine |