Last name シナモン (Cinnamon 
, シナモン 
, Sinnamon 
) , in all the world, is quite a rare surname. The last name シナモン is characteristic of Australia, where it is a rare surname, Canada, and Sri Lanka. Measured by absolute frequency, it is the most numerous in the United States, Canada, and Australia. Likewise, シナモン is the forename as well as the last name.