members include: John Dennis "J.D." Fitzgerald - the narrator of the series, and youngest of the three brothers. Thomas "Tom" Dennis "T.D." Fitzgerald Jr. - the mischievous middle brother and swindler extraordinaire. His nickname is "The Great Brain", and his escapades form the basis for the series. Throughout the series, Tom demonstrates that he possesses great intelligence and a money-loving heart, but at times, he also demonstrates great humanity and generosity. Sweyn Dennis "S.D." Fitzgerald - the eldest brother; who is more skilled than J.D. at catching Tom in the act. He and Tom attend Catholic boarding school together. After graduating that, Sweyn departs for Pennsylvania to live with relatives, where he attends a high school that was also his father's alma mater. He and Tom are two years apart, but Tom was allowed to skip the fifth grade. As a result, Sweyn and Tom attend the Catholic Academy together. Frankie Pennyworth - An unconscious boy rescued by Uncle Mark after a rock slide kills his brother and parents. When he first arrives, he has a mental block stemming from this trauma, in which he lashes out violently at the Fitzgeralds. John reflects that his name should be "Frankenstein Dollarworth", because, he says, Frankie is "a monster and a dollar's worth of trouble", and a battle of wills ensues when John is promised a large sum of money to try to cure Frankie's mental block, but only if Frankie does not need to be taken to a doctor in Salt Lake City. Frankie eventually becomes much better behaved and is adopted into the Fitzgerald family. Thomas Dennis Fitzgerald Sr. ("Papa" or "Fitz") - patriarch of the family. Owner, editor, and publisher of the town paper, the "Adenville Weekly Advocate". He is an Irish Catholic originally from the Eastern United States who headed west to seek his fortune as a newspaper writer and publisher. He is one of Adenville's leading citizens, and highly respected amongst the residents as he is the only citizen of Adenville to hold a university diploma. Tena "Mamma" Fitzgerald - The matriarch of the family and homemaker, of Danish-Scandinavian ancestry. Aunt Bertha - A Protestant widow who works as the family's maid, not actually a blood relative but still called "aunt" because she has been considered a part of their family. John explains that after Bertha's husband died, his parents hired her as she had no children,