Cognomen Dallen (Dallen 
) , worldwide, is a rare surname. The cognomen Dallen is habitual in Uganda, where it is a rare surname, Australia, and the United Kingdom. Not in comparison with a country's population, this name is the most popular in the United States, Uganda, and the United Kingdom. Also, Dallen is the forename as well as the last name.
| james dallen (b. 1943) |
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| russ dallen Venezuelan scholar (b. 1963) |
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