Prince Januarius Maria Immaculata Louis of Bourbon-Two Sicilies, Count of Caltagirone (Full Italian name: Gennaro Maria Immacolata Luigi, Principe di Borbone delle Due Sicilie, Conte di Caltagirone) (28 February 1857 – 13 August 1867) was the twelfth and youngest child of Ferdinand II of the Two Sicilies and his wife Maria Theresa of Austria.
Januarius was a member of the House of Bourbon-Two Sicilies.
The prince was named for Saint Januarius (Italian: San Gennaro), patron saint of Naples.