Juan de la Cerda, 5th Duke of Medinaceli, (1544 – 29 May 1594), Grandee of Spain, (in full, Spanish: Don Juan Luis de la Cerda y Manuel de Portugal, quinto duque de Medinaceli, cuarto marqués de Cogolludo, cuarto conde del Puerto de Santa María, Grande de España, señor de las villas de Deza y Enciso, embajador extraordinario en Portugal, caballero de la Orden del Toisón de Oro, Order of the Golden Fleece, since 1585), was a Spanish nobleman and Ambassador in Portugal.
He was the son of Don Juan de la Cerda, 4th Duke of Medinaceli and of Joana Manuel, daughter of Sancho de Noronha, 2nd Count of Faro. In 1565 he married Donna Isabella d’Aragona, daughter of Don Antonio d’Aragona, 2nd Duke of Montalto with whom he had two children. In 1580, he married for a second time, with Juana de la Lama, 4th Marchioness of la Adrada, a widow since 1571 of Don Gabriel de la Cueva, 5th Duke of Alburquerque, deceased as a Governor of the Duchy of Milan, Italy, with whom he had two more children.
http://en.wikipedia.org/wiki/Juan_de_la_Cerda,_5th_Duke_of_Medinaceli
accessed 09/04/14
kenyon1996, pp. 199-200 gives a combined list of instruments based on the inventory of the duke and on the valuation of his possessions. The instruments wold probably have been for the use of salaried musicians at his residence.
• dos sacabuches con sus cajas nuebas (400 reales) • un juego de flautas con honce flautas chicas y grandes metidas en una caja rota… 300 r • una caja con quatro cornamutas con cerraduras y llabe 10 duc • un tiple de chirimía con su caja 14 duc • tres tenores de chirimía 10 duc • un bajón viejo que no se sirbe del por estar desbaratado 6 duc • una corneta tuerta sin buquin 11/2 duc • cinco biolones ques contrabaxo y tenor y contralto y dos tiples que todo esta en una caja aforrada con paño colorado. tiene dos arquillos 50 duc (=18,700 mrs) • dos guitarras una mayor que otra con costillas de ebano y todo lo demas ecebto la tapa estan en una caja aforrada en paño morado por dentro 10 duc (=3740 mrs) • otros quatro arquillos de biolones viejos
The inventory also lists 3 books of music. One was large and contained “inos y magnificats de Nabarro” one of the others might have been the Cancionero de Medinaceli.
The valuation was carried out by the ministriles Geronimo Ximenez and Francisco de Oliva
Kenyon asserts that the violones would be violin family rather than vihuelas de arco.
Source: AHPM protocolos leg 628, f 668