This is the 476th most frequent Swedish word.
andreas
"Andreas" is a Swedish male given name, equivalent to "Andrew" in English.
In this sentence, 'Andreas' is a proper noun used as a subject, referring to a specific person.
Andreas är min bästa vän.
Andreas is my best friend.
Here, 'Andreas' is a proper noun indicating the possessor of the action 'läser', denoting who is reading.
Boken som Andreas läser är intressant.
The book that Andreas is reading is interesting.
In this example, 'Andreas' is a proper noun serving as the object of the preposition, referring to whom the speaker communicated with.