I cannot find anything about her than the note on the Prado’s Web page for this image.
From the museum’s Web site; filled in shadows and increased exposure.
Pre-revolutionary dress fades slowly away from Revolutionary France. Older people also don’t keep up with the latest styles as widow Salcedo shows. Her high straight coiffure is crowned by a dark cap, possibly of sheer fabric.
Keywords: 1791, Mancio, Tomasa de Aliaga, de Aliaga family, Salcedo family, Spanish, straight coiffure, cap, hair jewelry, girandole earrings, necklace, pendant, fichu, vee neckline, bodice, U-neckline, chemise, trapezoidal neckline, three quarter length sleeves, bows, lace engageantes, bracelets, full skirt, mourning dress