The Bobbsey Twins, and their namesakes, are characters from the popular children's book series written by Edward Stratemeyer. The two sets of twins, Nan and Bert, and Flossie and Freddie, were created in 1904 and have been featured in over 100 books. The crossword solution for the term 'Bobbsey Twins, and Namesakes' is NANS, which stands for Nan and Flossie, the two female twins in the series.