There are several publications - Kneens and Moores, which are referred to in Francis Coakleys Manx Note book - indeed I think there are quotations from one of these on that site. Up to date book, still in print, is Surnames of the Manks by Leslie Quilliam, ISBN 0 9514539 0 4 Published byp Cashtal Books, Peveril Road, Peel, Isle of Man. First printed 1989, reprinted (my copy) 1996. Approx £10. He also refers to the older books, with quite some insight. Why don't you write to him?