Alfonso was totally forested until the 17th century when a few pocket settlements sprouted. The town was originally part of Barrio Lumampong in the town of Indang. In the course of time, the pocket settlements grew into sitios and later on into barrios. The town became a separate district municipality from Indang on 16 May 1859 through the efforts of the community leaders Bonifacio Aveo and Felix del Mundo. The new town was called Alas-as for a period of seventeen years. The name refers to the name of a tree used for the construction of houses and bears sweet fruit. It was, eventually, named after King Alfonso XII of Spain, son of Isabella II. Alfonso was initially composed of the barrios of Taywanak, Pajo, Esperanza, Marahan, Matagbak, Sinaliw and Kaytitinga. Don Narciso Mojica was the capitan municipal of Alfonso at the outbreak of the Philippine Revolution. A few days after the Cry of Balintawak, on 31 August 1896, General Mariano Trias ordered the liquidation of all Spaniards in the municipality. In the bloody battle that followed, the leaders of the revolutionists were General Hipolito Rint, Captain Eriberto Cetro (Kapitan Berto) and Predencio Rolle (Tandang Doro).