This is the 479th most frequent Swedish word.
jönköping
Jönköping: A city in southern Sweden, located by the southern end of Lake Vättern.
Here, 'Jönköping' is used as a proper noun to indicate the name of a city.
Jag kommer från Jönköping.
I come from Jönköping.
In this sentence, 'Jönköping' is again used as a proper noun, referring to a destination.
Vi planerar att åka till Jönköping på semester.
We plan to go to Jönköping for vacation.
Here, 'Jönköping' is used possessively, attributing something to the city.