This is the 6197th most frequent Swedish word.
kristensens
"Kristensens" is not a standard Swedish word; it appears to be a Danish surname.
Here 'Kristensens' is used to indicate possession, meaning the book belongs to Kristensen.
Kristensens bok är mycket populär i vår klass.
Kristensen's book is very popular in our class.
In this sentence, 'Kristensens' demonstrates ownership of the ideas, showing that they originate from Kristensen.
Vi diskuterade Kristensens idéer under mötet.
We discussed Kristensen's ideas during the meeting.
Here, 'Kristensens' links the name to Kristensen, indicating whose name is being referred to.