Family name 赖尔 (Reil 
, Ryle 
, 赖尔) , all over the world, is quite a common cognomen. The last name 赖尔 is habitual in Germany, where it is quite a rare surname, Ireland, and Mauritius. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and the United Kingdom. Also, 赖尔 is the forename as well as the last name.