Family name 尔刚 (Ergang 
, 尔刚 ) , all over the world, is a rare surname. The surname 尔刚 is characteristic of Slovakia, where it is a rare surname, Canada, and Germany, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in China, Brazil, and the United States. More prevalently, 尔刚 is the forename as well as the last name.