Surname しろう (Shiro 
, しろう) , around the globe, is quite a common cognomen. The cognomen しろう is habitual in Kenya, where it is quite a rare surname, Japan, and Qatar, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Japan, Kenya, and Indonesia. Also, しろう is the forename as well as the last name.