Family name ถนน (Roadi 
, Roade 
, ถนน 
) , in all the world, is a rare cognomen. The cognomen ถนน is habitual in Uruguay, where it is a rare surname, Spain, and Argentina, where it is a very rare surname. In absolute terms, it is commonest in Spain, India, and Argentina. Much less frequently, ถนน is the forename as well as the last name.