This is the 3205th most frequent Swedish word.
rydahl
"Rydahl" is not a standard Swedish word; it is typically a surname.
In this sentence, 'Rydahl' is treated as a proper noun, specifically a family name.
Rydahl är namnet på en familj som bor i Göteborg.
Rydahl is the name of a family living in Gothenburg.
Here, 'Rydahl' refers to an author, suggesting it is used as a surname for identification of a person.
Jag läste en bok av Rydahl som var mycket spännande.
I read a book by Rydahl that was very exciting.
In this context, 'Rydahl' is a person's last name, emphasizing their reputation within a professional setting.