Genealogical information is sketchy. Her geni.com sketch is here.
From pinterest.com/akpark09/damas-españolas-siglo-xvii/. Also posted to the Iberian Dress in the Louis XIII and XIV Eras here.
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