Claus Braun is a pseudonym used by an author whose work is not detailed in the provided text.
The provided text details the origins and variations of the name Nicholas, tracing its etymology from ancient Greek to its widespread use, particularly in Christian cultures due to Saint Nicholas. It highlights the name's meaning as 'victory of the people' and its historical presence, even noting its use as a female name in Scottish fishing communities until the late 19th century. The text also lists numerous individuals named Nicholas across various fields and countries, ranging from rulers and popes to academics, artists, and athletes. However, it does not contain any information directly pertaining to an author named Claus Braun or their specific contributions.