In reply to Rog Wilko:
As far as I'm aware, Rog the most southerly fell in Britain is Longridge Fell. If this is true then there are no fells in the Peak. I have heard of 'fell runners' being used to describe just about anyone who runs up hills but that's outside my experience.
Scandinavian settlement occurred all over Britain but I think the further south you go they were mainly Danes. Perhaps the Danes didn't use the word 'fell'? In the Lakes, Dales and Scotland they were largely of Norse origin and as you know fells are very common there.
Post edited at 14:05