Ceferino "Joker" Paz Arroyo Jr.[1] (Tagalog pronunciation: [ɐˈɾɔjɔ]; January 5, 1927 – October 5, 2015) was a Filipino statesman and key figure in the 1986 EDSA People Power Revolution that ousted dictator Ferdinand Marcos.

Arroyo received various awards and commendations for his significant contributions to the law profession and public service.

Among these are the Philippine Bar Association's Most Distinguished Award for Justice as a "man beholden to no one except to his country" and Senate Resolution No.

He was also known for being the thriftiest legislator, earning the title of "Scrooge of Congress",[2] as he only had few staff members without bodyguards and did not use his pork barrel funds.

Arroyo and other lawyers joined in questioning other Marcos' acts before the Supreme Court: 1) the ratification of the Marcos-dictated 1973 Constitution; 2) Amendment Six that empowered President Marcos to exercise lawmaking powers alongside the Batasang Pambansa; 3) the power of military tribunals to try civilians.

These protestations did not stop Marcos' consolidation of power at the time, but showed that not all leading Filipinos were fully supportive of him.

Arroyo participated in the trials of political detainees such as Senator Benigno Aquino Jr., ABS-CBN Executive Eugenio Lopez Jr., Cebu politician Sergio Osmeña III, Communist Party of the Philippines founder Jose Maria Sison, Senators Jovito Salonga and Eva Kalaw, lawyers Aquilino Pimentel Jr., Renato Tañada, Eduardo Olaguer and many others.

Arroyo served as Aquino's alter ego in her issuance of Executive Orders (formerly Presidential Decrees).

Among these are the Philippine Bar Association's Most Distinguished Award for Justice as a "man beholden to no one except to his country" and a Senate Resolution No.

He was a popular figure in the House of Representatives with a 100% attendance record for nine years from the time he was elected up to the end of his last term.

He also ran for House Speaker during the opening of the 11th Congress in 1998, but lost to Las Piñas Representative Manny Villar with a vote of 171–37.

His role in the impeachment trial earned him one of preferred choices in the SWS and Pulse Asia survey for a Senate race.

He claimed to have never traveled abroad on government money and his Statement of Assets and Liabilities remained almost unchanged from the time he entered public service in 1986.

Antonia Odelia "Maoi" Gregorio Arroyo, CEO of Hybridigm Consulting, the first biotechnology commercialization firm in the Philippines.