Laguna de Bay
The Province of Laguna, which was formerly called "La Laguna" and "La Provincia de la Laguna de Bay", was named after Laguna de Bay, the body of water that forms its northern boundary. Laguna de Bay, in turn, was named after the town of Bay, the first provincial capital. Captain Juan de Salcedo with a band of one hundred Spanish-Mexican soldiers conquered the province and its surrounding regions for Spain in 1571. The province of La Laguna comprised the modern province of Laguna, as well as parts of what is now known as Rizal and Quezon.