Etienne Allegrain was a landscape painter who worked predominantly in the tradition of classical scenes established in the mid-17th century by Nicolas Poussin and Claude Lorrain. His brother Jean-Baptiste Allegrain (1644–before 1714) was a sculptor, while his son Gabriel Allegrain (1679–1748) was also a landscape painter, whose works can be distinguished from those of his father only with difficulty. Gabriel's son Christophe-Gabriel Allegrain was a sculptor who was much influenced by his more illustrious contemporary and brother-in-law Jean-Baptiste Pigalle. Christophe-Gabriel's own son Gabriel Allegrain (1733–after 1779) was a sculptor who worked in the naval dockyard at Rochefort.