Georgius Jacobus Johannes van Os (20 November 1782 The Hague - 11 July 1861 Paris), was a 19th-century painter from the Netherlands.
According to the RKD he was a son and pupil of the painters Jan van Os and Susanna de la Croix, and a brother of the painters Pieter van Os and Maria Margaretha van Os.[1] In 1809 he won the first prize of the Society Felix Meritis in Amsterdam for a still life in which genre he later specialized.[1] Van Os became Ridder in de orde van de Nederlandse Leeuw in 1812.[1] From 1816 to 1820 he worked in Amsterdam.[1] In 1822 he moved to Paris, where he worked for the Sèvres porcelain factory.[1] He painted landscapes, but was, like his father, best known as a painter of flowers.[1] Starting in the 1830s he spent his summers in Haarlem, where he continued working on flower illustrations for the "Flora Batava" edited by Jan Kops.[1]
He is not to be confused with the son of his brother Pieter, also a painter called Georgius Jacobus Johannes van Os, but who lived from 1805 to 1841 and continued the family painting tradition.