Hi Jack,
I just typed in cooksons of penrith in " microsoft search" and it has come back with over 250 listings, some of them have occupations and other information, one of them have said the poet Wordsworth was married to a Cookson from Penrith, it may be worth your while to scan the listings yourself as there is a lot of information, to much to transfer to here, hope this helps a bit best regards StericoO0