I used to live in Egremont, about 14 miles from Whitehaven, and it's one of the only places I've been outside Liverpool where Fearon is a common name. Curiously the Cumberland Fearons are protestants - whereas the Liverpool branch are Irish Catholics. I'm told the name is French-Irish and originates from one of the attempted invasions of the British Isles during Elizabethan times. It means 'smith'. There are still many Fearons living along the north-west coast who would perhaps be able to help you.