She was the youngest surviving daughter of Maria Luisa of Parma and appeared in Goya's 1800 family portrait being held by Maria Luisa. Although plain, Maria Isabella had a satisfactory marriage with King Francesco. She had 12 children including future Queen of Spain Maria Cristina and Maria Antonia. Her Wikipedia article is here.

1806 María Isabel de Borbón y Borbón-Parma, infanta de España y reina de las Dos Sicilias by Jean-Jacques Guillaume Bauzil Koc (Museo Nacional del Prado - Madrid Spain)

1820 Famiglia di Francesco I delle Due Sicilie by Giuseppe Cammarano (Museo di Capodimonte, Napoli Italy)

1819 Isabel, mother of Queen Maria Cristina by Giuseppe Cammarano (Reggia di Caserta - Caserta, Campania, Italy)

ca. 1820 Seated Maria Isabella, Infanta of Spain by Pieter van Hanselaere (location unknown to gogm)
