I am researching family tree, and paternal g grandmother was 'Amy Feirn', several siblings. Amy's father was 'John Feirn' and mother 'Sarah Ann Feirn' nee Craft. Believe that family originated, around Lincoln, then onto North Lincolnshire, by the Humber, then over into North Yorkshire. Amy is buried at Tadcaster, North Yorkshire.
My great aunt is also a Feirn by marriage.
Interested to talk to you, as such an unusual name, and although on my travels encounter various forms, still come back to Feirn.
Look forward to speaking to any one with an interest.