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Across the world, Claessen (Νικόλαος , Claessen ) is quite a rare masculine given name. The first name Claessen is characteristic of Southern Europe, particularly Greece, where it is quite a common masculine name. More frequently, Claessen is the last name as well as the forename.
Claessen is also a prevalent name for the fictitious and mythical characters: Nick Wilde , the Zootopia character; Nick Fury , the fictional character from the Marvel Cinematic Universe, Avengers: Infinity War; Michael Darling , the fictional character from Peter Pan; Nearly Headless Nick , character in Harry Potter and Nicholas Brody , the fictional character on the American television/drama thriller Homeland, and in many other works.