Laguna de Bay, the country's largest freshwater lake, is named after the town.

In the old Tagalog language, the name Bay derives from the same phonetic roots as "baybay" (shore) and as "babae" (woman) and "babaylan" (priestess).

In the case of the latter, it has been suggested that the great lady might be the same as Maria Makiling, as her mountain was within the scope of Bay's original territory.

Martin de Rada's mission resulted with Gat Pangil and his three daughters converting to the Catholic faith.

"[9] Either way, the similarity in spelling has led to the misconception that the town was named after Laguna de Bay.

Miguel Lopez de Legaspi, after establishing the city of Manila on June 24, 1571, ordered the exploration and pacification of the surrounding villages and settlements.

From Taytay and Cainta in Manila, Salcedo proceeded to Bay, Liliw, Nagcarlan and Majayjay and to other towns where up-on Fr.

Alvarado's intercession, the natives surrendered peacefully with Fray Diego de Espinar and 60 men.

Martin de Rada, the superior of the Augustinian religious order who came with the Legaspi expedition in 1565, started to build a bamboo and nipa church under the patronage of Saint Augustine along the lakeshore of Bay (i.e. Aplaya, now San Antonio).

Fray Gaspar de San Agustin further wrote that in 1586, the Augustinian Fathers organized the visita into a convent with a priest.

Thus, Sampaloc which came to be known as San Pablo de los Montes, ceased to be part of the Bay parish.

It is also located at the east of Los Baños, west of Calauan, northeast of Santo Tomas and northwest of Alaminos.

The history of Barangay Calo started during the Spanish era, where the native Filipino folks lived in the jungle.

History of Barangay Puypuy it was told that a big meteor fall in this Barangay and native people here told to the Spanish authorities that there is a fire falling (meteors) but in a native Tagalog word "apoy" means fire.

University of the Philippines anthropologist Dr. Bonifacio Comandante, who headed the team who helped unearth the finds, suggested that the find indicates that "there was a community here and they used the pots and jars for jar-burial", essentially confirming a human presence in Barangay Puypuy as early as 800 B.C.

Saint Anthony's feast day is on June 13 Named after St. Isidore the Laborer, the patron of farmworkers known for his piety toward the poor and animals.

Name after St. Dominic and Don Domingo Ordoveza, who once owned a large part of what is then sitio Tabon.

The name was given by Donato Ople who served as a long time school principal in the town of Bay.

It is also one of the busiest barangays since a lot of convenience stores can be found here and it is near to the town's new public market, "Pamilihang Bayan ng Bay".

The latest census figures in 2020 denote a positive growth rate of 0.19%, or an increase of 30 people, from the previous population of 3,358 in 2015.