The Valle-Riestra name in Peru encompasses a very large and old family with many branches. I don't know if the limited information offered below is related to the person you are looking for. You should try searching the Mormon's online database and this Peruvian site (in Spanish) which includes photo achives of the Valle-Riestra family: www.courret.perucultural.org
The following are notes from my research on Naval Captain Ramon Valle-Riestra (1819-1867) and his children.
Ramon was born in 1819 in Lima Peru, the sixth of seven children of Antonio Maria Valle y Seijas (1861-1820) and Isabel Maria Garcia de la Riestra y Sanier.
ANCESTORS: The Valle-Riestra are descended from ancient Spanish ancestry, counting among their ancestors Sannier de Montmorancy, and connected with the Leon de Lara and other lineages of the peninsula. The trunk of the Valle-Riestra family in Peru were Antonio Maria del Valle y Seijas and Isabel Maria Garcia de la Riestra y Sannier, who were married June 28, 1800, according to Los Pezet en el Peru.
MARRIAGE: Naval Captain Ramon Maria Valle-Riestra married Manuela Corbacho y Tirado, who was the daughter of national independence leader Jose Maria Corbacho y Abril and Maria Manuela de Tirado y Coronel Zagarra. Ramon and Manuela had two children. Their son, Jose Maria Valle-Riestra y Corbacho, was a noted musician and composer who was born in 1859 and married Margarita Correa Veyan in 1891. Their other child, daughter Maria Valle-Riestra y Corbacho, married Carlos Pezet Eastted, the grandson of President Pezet, in 1885.
HISTORY: On April 14, 1864, Naval Captain Ramon Valle-Riestra earned a place in Peruvian history when a Spanish squadron of two frigates and a schooner under the command of Rear Admiral Luis Hernandez Pinzon seized the islands of Chincha, a major source of guano (bird droppings exported as fertilizer), overpowering the scant garrison commanded by Valle-Riestra and forcing him to surrender. At that time Spain did not have diplomatic relations with Peru, nor had recognized its independence in 1821. After occupying the islands, the Spaniards also blockaded Peru`s major ports and forced the Peruvians into negotiations. Over the next months, Madrid sent five more warships to reinforce its squadron and replaced Pinzon with the more capable Rear Admiral Juan Manuel Pareja. Finally, in January 1865, a preliminary agreement between Peruvians and Spaniards was reached. The Vivanco-Pareja Treaty however was very humiliating for Peru and a revolution against the Pezet Government exploded in the city of Arequipa one month later. *** BIOGRAPHY: Jose Maria Valle Riestra Corbacho was born in Lima in 1859 and died in 1925. He was the son of Naval Captain Ramón Maria Valle Riestra and Manuela Corbacho y Tirado. He married Margarita Correa Veyan in 1891. He was a musician and composer. Source: courret.perucultural.org
BIRTH: The DOB 9 Nov 1859 and place, Lima, comes from the FamilySearch International Genealogical Index. *** BIOGRAPHY: Maria Valle-Riestra y Corbacho was born in 1860, according to Genealogia Peruano, and was the second and youngest child of the Naval Captain Ramon Maria Valle-Riestra and Manuela Corbacho y Tirado, who was herself the daughter of national independence leader Jose Maria Corbacho y Abril and Maria Manuela de Tirado y Coronel Zagarra. Maria Valle-Riestra y Corbacho was the sister of the notable Peruvian composer Jose Maria Valle-Riestra, author of the operas: Ollanta, Atahualpa, La Perricholi, and a requiem mass, composed and dedicated to the memory of his in-law, General Juan Antonio Pezet (President of Peru 1863-65). She married Carlos Pezet Eastted in Lima in August 1885 and had four children:
a. Carlos Pezet Valle-Riestra(1885-1955) b. Oscar Pezet Valle-Riestra(1894-1932) c. Consuelo Pezet Valle-Riestra d. Hector Pezet Valle-Riestra(1897-1949)