We find the information about the main character in Charles Dickens's series (first known as his first novel) The Pickwick Papers at the very beginning of the tale, on chapter 1. This chapter, titled The Pickwickians, introduces us to the high and mighty click of the Pickwick Club: A club of self-important members with self-important rules.
Samuel Pickwick, Esq., G.C.M.P.C. which stands for General Chairman and Member of the Pickwick Club, is the founder of this club. In it, researchers of many fields (he, himself is a researcher in the field of biology) travel around the counties telling about their discoveries. Therefore, Samuel Pickwick is the man for whom the series were named.