[1][3] Juan Marcelino was the teniente mayor of Laglag who was highly instrumental for the re-establishment of Dingle in 1823 as a pueblo in its own right,[4] while Luís Cantalicio, the longest-serving gobernadorcillo of Dingle, sold a number of his vast landholdings (haciendas) to pay for the tributes of his constituents during his years in office as town head.

[5] His elder brother, Gen. Julio Hernández y Dayot, later became the Secretary of War of the Federal State of the Visayas during the revolutionary period.

[1] Hernández was fully engaged in agriculture from 1890 until October 1898 when the second phase of the Philippine Revolution against Spain during the Spanish–American War broke out in the Visayas.

[6] During the Philippine Revolution, Hernández organized a revolutionary movement in Iloilo against the Spanish colonial authorities and then from 1898, against the United States.

[8] He was designated Chief of Staff of the revolutionary government in the Visayas in November 1898 and represented the province of Iloilo at the Malolos Congress.

Halfway through his term of office as Iloilo governor, he resigned from his gubernatorial post after the American colonial government offered to appoint him as director of Agriculture.

A practicing farmer, Hernández became the first Filipino director of the Bureau of Agriculture in 1916, which had been headed by American colonial officials before his tenure.