Cardozo was born to lawyer and retired colonel (Philippine Constabulary) Raymundo V. Luna and his wife, Teofista M. Luna. He was born in San Ildefonso, Bulacan, Philippines and raised in Santo Tomas, Batangas where he graduated consistently on top of his elementary and high school classes. Owing to Colonel Luna's profession as a lawyer, his son Cardozo is named after Benjamin N. Cardozo, the renowned Associate Justice of the United States Supreme Court who significantly contributed to the development of American Civil Law in the 20th century. He descended from the Luna clans of Badoc, Ilocos Norte where the ancestry of Antonio Luna and Juan Luna, members of the 1896 Philippine Revolution also came from.
