Last name ベルトラム (Bertram 
, Beltram 
, ベルトラム) , around the world, is a common surname. The last name ベルトラム is habitual in Jersey, where it is quite a common surname, Germany, and Denmark, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and the United Kingdom. Also, ベルトラム is the forename as well as the last name.