This is the 7284th most frequent Swedish word.
sebastian
The Swedish word "Sebastian" is a male given name, not a term with a specific definition.
In this sentence, 'Sebastian' is used as a proper noun, specifically as the subject of the sentence.
Sebastian gillar att spela fotboll.
Sebastian likes to play football.
Here, 'Sebastian' is used as a proper noun serving to specify the name of a person being referred to.
Min bästa vän heter Sebastian.
My best friend is named Sebastian.
In this case, 'Sebastian's' denotes possession, indicating that the dog belongs to Sebastian.