Cognomen โสมน (Somon 
, Somaan 
, โสมน ) , throughout the world, is a common family name. The last name โสมน is characteristic of Western Asia, particularly Oman, where it is quite a common surname, Bahrain, where it is quite a rare surname, and Qatar. Measured by absolute frequency, it is the most numerous in Bangladesh, Japan, and Saudi Arabia. Likewise, โสมน is the forename as well as the last name.