Last name ともひろ (Tomohiro 
, ともひろ) , in all the world, is quite a rare cognomen. The cognomen ともひろ is habitual in Singapore, where it is a rare surname, Japan, and Hungary. Not in comparison with a country's population, the name is most common in Japan, China, and Singapore. Also, ともひろ is the forename as well as the last name.