The four names (presumably all surnames) are printed at the top of all abstract pieces of paper throughout the first and second series. The names are printed on pieces of paper in different books, including the Black Book of Buried Secrets, The Cahill Files 1 to 4 and the booklets which come with card packs. Only two of the names is known - McIntyre, surname of William McIntyre, one of the longest running characters, and Beatrice's lawyer Smood. It is now assumable that they are the lawyers working for the cahills, as William McIntyre was Grace Cahill's lawyer, and Mr. Smood was Beatrice's.