Juan Miguel de Esparza (1712–1766) was a Spanish military man, merchant and politician, who had a long career as a colonial official of the Viceroyalty of Peru, where he held the honorary positions of alcalde and regidor.

He carried the Royal Standard for various periods, including during the celebrations for the assumption of Ferdinand VI, being escorted by a Regiment of Dragons with sword in hand.

[13] He was also in charge of the legal defense of people without economic resources, including a black man named Felix, who had exercised the office of executioner of the city of Buenos Aires.

In 1752, he participated in punitive expeditions against the Calelián tribes, serving in the "La Valerosa", a militia of the Blandengues of the Frontier, under command Captain José de Zarate.

[20] His wife María Eugenia Sánchez Gallanos, was born in 1730 in Buenos Aires, and died on March 3, 1817, being buried in the Santo Domingo convent.

[22] Very few genealogical and historical data are found about his father, Captain Francisco Sánchez Gallano, a Spanish noble, belonging to the Third Order of Saint Francis.

[25] Juan Miguel de Esparza was a remote descendant of illustrious Spanish personalities who included the kings and queens of Castile and Navarre.

[27] Through his daughters his lineage was related to distinguished patrician families like the Porcel de Peralta[28] Ramos Mexía, Castro Castillo, Pueyrredón O'Dogan, Sundblad Sáenz and others.