This is the 1062nd most frequent Catalan word.
carlos
The word "Carlos" is a proper noun in Catalan, typically used as a given male name equivalent to "Charles" in English.
Here, 'Carlos' is used as a personal proper noun, referring to a specific individual's name.
Carlos és el meu amic.
Carlos is my friend.
In this sentence, 'Carlos' is again a proper noun, but it's used to indicate a destination related to a person's location.
Vaig a Carlos.
I am going to Carlos.
Here, 'Carlos' is part of a full personal name, indicating authorship or relation to the mentioned work.