(1806-1874) the artist’s only grandson, was born on 11 July 1806 in Madrid, son of Francisco Javier Goya and Gumersinda Goicoechea. There are three known portraits of Mariano by Goya, full-length portrait aged four, head and shoulders at the age of six-eight years old, and head and shoulders portrait as a young man. See: Francisco de Goya. Portrait of Mariano Goya, the Artist's Grandson. Mariano Goya, the Artist's Grandson.