John Jennings, His Brother and Sister-in-Law (Swedish: Brukspatron John Jennings, hans bror och svägerska) is a 1769 portrait painting by the Swedish artist Alexander Roslin. It depicts the Swedish merchant John Jennings, his brother Frans and sister-in-law Jeanne ÃÂlise Trembley posing by a harpsichord. The family sat for the artist while on a visit to France where Roslin was based at the end of a Grand Tour around Europe. The painting was exhibited at the Salon of 1769 at the Louvre in Paris, where it was praised by the art critic Denis Diderot. Today it is in the Nationalmuseum in Stockholm.