Genealogical information is sketchy. Her geni.com sketch is here.
From pinterest.com/akpark09/damas-españolas-siglo-xvii/.
The supports below the wide skirt can be seen. The structure would be used throughout Europe for most of the 1700s to support wide panniers.
Keywords: María-Francisca de Coterillo y Ortega, Coterillo Ortega Calderón family, Hurtado de Salcedo Sierralta family, Marquesa de Legarda, Marquise, Spanish, floral headdress, shallow necklace, fitted bodice, bertha, bows, long paned puffed virago sleeves, back-flared cuffs, full skirt, flounces, tontillo