I’ve grown up in the Peak District and wrote a blog for the Ordnance Survey on how we have evolved together…
“The word ‘Peak’ is nothing to do with the parks hills, but the Saxon ‘Pecsaetan’ tribe which inhabited the area, but the park does have its fair share of hills…”
https://getoutside.ordnancesurvey.co.uk/guides/the-peak-district-britains-1st-national-park/