The child in the portrait appears to be the Infanta María Isabel (1743-1749), the third daughter of Charles of Bourbon and Maria Amalia of Saxony, whose birth was received with special joy after the death of her two elder siblings. For this reason, she was portrayed on several occasions. She appears here as an heir being crowned by an angelic trumpeter.
The Infanta (1743-1749), the daughter of Charles III, is seen playing with a little dog, as in another portrait of her at an earlier age and in that of The Family of Philip V. The picture may have been sent to Spain from Naples, or brought with him by Charles III when he ascended to the throne of Spain, in memory of his daughter, by then already deceased.