Emilio Jacinto y Dizon was a Filipino

Philippines

The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

 revolutionary

Revolutionary

A revolutionary is a person who either actively participates in, or advocates revolution. Also, when used as an adjective, the term revolutionary refers to something that has a major, sudden impact on society or on some aspect of human endeavor.-Definition:...

 known as the Brains of the Katipunan

Katipunan

The Katipunan was a Philippine revolutionary society founded by anti-Spanish Filipinos in Manila in 1892, whose primary aim was to gain independence from Spain through revolution. The society was initiated by Filipino patriots Andrés Bonifacio, Teodoro Plata, Ladislao Diwa, and others on the night...

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Born in Trozo, Tondo, Manila. Jacinto was the son of Mariano Jacinto and Josefa Dizon. Mariano died shortly after Emilio was born, forcing Josefa to send him to his uncle, Don José Dizon, so that he might have a better standard of living.

Jacinto was fluent in both Spanish and Tagalog

Tagalog language

Tagalog is an Austronesian language spoken as a first language by a third of the population of the Philippines and as a second language by most of the rest. It is the first language of the Philippine region IV and of Metro Manila...

, but preferred to speak in Spanish.