I worked for Charlie Kerruish at Ballafayle, Maughold over fifty years ago. He once told me that a man was found on the beach and the manx people yelled Kerruish, Kerruish or whatever the spelling was and they were really saying "naked man, naked man" and that was how the Kerruishes got their name. Thought you might be interested. Charlie might have been pulling my leg but i believed it at the time.