Submitted NameRevisions Save Type Surname (from nickname) Usage French, French (Belgian) Other Forms FormsGrandjean Edit Status Status [show contributorshide contributors] Added 5/29/2020 by General9696 Edited 5/29/2020 by General9696 Meaning & History Derived from French gros "large" and the given name Jean 1. As a nickname, it is sometimes applied to a person who is perceived as stupid.