Juan José Gregorio Fernández

José Gregorio Fernández Cuello (24 December 1789 – 4 October 1845) was an Argentine military officer who took part in the Spanish American Wars of Independence in what are now Argentina, Bolivia, and Peru. He served in the armies of his native country as well as in those of Peru and Bolivia, attaining the rank of general. He was also Prefect of La Paz and Chuquisaca.

Biography Gregorio Fernández was born in the city of Salta, Intendancy of Salta, Viceroyalty of the Río de la Plata, on 24 December 1789, the son of Manuel Salvador Fernández del Casso and Cecilia Cuello Fernández Cabezas y Argañaraz. He was baptized on 26 December 1789, in the Church of San Juan Bautista de la Merced in Salta, with Dr. Tadeo Fernández Dávila as his godfather.

He supported the May Revolution and joined the Army of the North (United Provinces of the Río de la Plata). He fought in the Battles of Cotagaita and Suipacha. In 1811, holding the rank of lieutenant of the 1st Company of Regiment No. 2, he fought in the Battle of Huaqui. After the withdrawal of Liberator José de San Martín, he came under the orders of Simón Bolívar. He served “from this time on with the most distinguished credit in the Peruvian army.” Promoted to the rank of colonel of infantry, he fought in the Battle of Junín on 6 August 1824. In 1825 he received command of the new Pichincha Regiment, formed from the 1st and 2nd battalions, and the following year he was promoted to general in the armies of Peru.

In April 1826 he was appointed by General Antonio José de Sucre as Prefect and Commanding General of the Department of La Paz.

On 24 December 1827, he was arrested by the mutineers of the Voltígeros battalion.

Seeing their plans thwarted, the conspirators sought salvation in flight. Accordingly, Fernández withdrew to Salta, where he lived for many years until, called by General Ballivián in 1843, he returned to Bolivia. There he once again held important posts, having been Prefect of Chuquisaca that same year.

He died on 4 October 1845, in Sucre, possibly as a result of sepsis following a surgical procedure performed by physician José Matías Agois, which was questioned in terms of necessity and skill by Dr. Manuel Ascencio Cuellar.

Family He married Bailona Costas Frías on 28 November 1825, in the Cathedral of Potosí, Bolivia. His wife was the daughter of Francisco Andrés Avelino Costas Gauna and Justa de Frías y Vélez Alcócer. They were the parents of:

Dr. Emilio Fernández Costas, born in 1830. He married Bailona Molina Frías, daughter of Dr. Manuel Molina Zamudio, on 15 July 1854, in the Church of San Miguel Arcángel, Sucre. Ana María del Carmen Fernández Costas, born 26 July 1831, in Potosí. Francisco Fernández Costas, born 9 March 1833, in Potosí. He married Carolina Gandarias Reynolds on 2 May 1867, in the Church of Santo Domingo, Sucre. María del Carmen Fernández Costas, born 6 October 1845, in Sucre. She married José Casimiro Santiváñez Escalier on 18 June 1881, in the Church of Santo Domingo, Sucre.

His wife Bailona died in Sucre on 30 October 1886 and was buried in the Church of Santo Domingo, Sucre.