The term 'FIRST NAME IN MYSTERY' can be solved by the following crossword solutions: Ellery (6 letters), Erle (4 letters), AGATHA (6 letters), EDGAR (5 letters), and Erll (4 letters). Ellery is the first name of the fictional detective character created by American author Frederic Dannay and Manfred B. Lee, who wrote under the pseudonym of 'Ellery Queen'. Erle is the first name of the fictional detective character created by British author Arthur Conan Doyle, Sherlock Holmes. AGATHA is the first name of the fictional detective character created by British author AGATHA Christie, Hercule Poirot. EDGAR is the first name of the fictional detective character created by American author EDGAR Allan Poe, C. Auguste Dupin. Erll is the first name of the fictional detective character created by American author Erle Stanley Gardner, Perry Mason.