John Florentine Leonzon Teruel (July 25, 1950 – January 19, 2021) was the first Patriarch and the founding bishop of the Apostolic Catholic Church (ACC).

[2] John Florentine received his Doctor of Philosophy Major in Educational Management in 2002 at the Philippine College of Health and Science.

[5] Teruel was appointed as chairman of the National Social Action Council (NASAC) in 2013, an advisory body under the Office of the President of the Philippines.

After his death, he was succeeded by his long time Chancellor, Senior Archbishop Juan Almario.

[2] The Apostolic Catholic Church canonized John Florentine as a saint by his successor Patriarch Juan Almario on August 1, 2021 at the National Shrine of Ina Poon Bato in Quezon City.