You have certainly selected a difficult topic. In Matthew Kneale's book "English Passengers" (no relation), the author references several Manx names. There are the following references in the paperback copy:
Page 4 References to Kewley
Page 11 "Quayles, I should tell, were well known for being strange articles..."
Page 33 Some entertaining Anglo-Manx comments about someone named Gawne
Good Luck!