The Bobbsey Twins are a series of children's novels written by American author Laura Lee Hope. The main characters in the series are NAN and Bert Bobbsey, two sets of fraternal twins, and their younger siblings Flossie and Freddie. NAN and Bert are the oldest, followed by Flossie and Freddie, and finally NAN's twin brother Esau and ANN, the youngest Bobbsey. The crossword solutions for the term 'A Bobbsey Twin' are Nans (4 letters), Flossie (7 letters), Bert (4 letters), NAN (3 letters), Esau (4 letters) and ANN (3 letters).