Cognomen ارنولد (Arnold 
, ارنولد 
, Ahnold) , in the world, is a widespread last name. The surname ارنولد is habitual in Belize, where it is a common surname, Guernsey, and Switzerland, where it is quite a common surname (explore the name in all countries). In absolute terms, this name is the most popular in the United States, Germany, and the United Kingdom. Likewise, ارنولد is the forename as well as the last name.