We don't...that's the first time I've ever seen it spelled like that. The name of the town is Norwegian

>The second comes from Norwegian explorer Otto Sverdrup and means “pig fiord” for the grunting sound that walrus herds make and the fact this spot is tucked between cliffs at the mouth of a gorgeous fiord.

I don't know why the author spelled it like that throughout the article when talking about the landform.

https://wikidiff.com/fiord/fjord

Apparently fiord is a New Zealand spelling? >Alternative forms * fiord (New Zealand