This is the 3087th most frequent Swedish word.
lisbeth
"Lisbeth" is a Swedish female given name, equivalent to "Elizabeth" in English.
Here, 'Lisbeth' functions as a proper noun, specifically a personal name used in a complimenting context.
Lisbeth är det vackraste namnet jag vet.
Lisbeth is the most beautiful name I know.
In this sentence, 'Lisbeth' is used as a proper noun referring to a specific individual, implying she is known to both the speaker and listener.
Har du sett Lisbeth idag?
Have you seen Lisbeth today?
Here, 'Lisbeth' is part of a possessive form ('Lisbeths'), indicating that the book belongs to her.