Upsilon Sigma Phi
Founded in 1918, the Upsilon Sigma Phi (ΥΣΦ) is the oldest Greek-letter fraternity in Asia. It is the oldest student organization in the University of the Philippines that has been in continuous existence since its founding and predates the Philippine Collegian which was established in 1922, and the UP Student Council which was revived in 1924.
The Greek letters ΥΣΦ stands for the initials of the name "University Students Fraternity." The head of the fraternity is known as the Illustrious Fellow. The first honorary fellow University Regent Conrado Benitez wrote the Upsilon Hymn which later would be sung before and after every formal meeting.
Chapters
The Upsilon Sigma Phi has two chapters. A combined UP Diliman/UP Manila chapter and a second one in UP Los Banos.
Upsilonians during WWII
During World War II, some members took the field. Among the Upsilonians who gave up their lives were Wenceslao Q. Vinzons (former UP Student Council President, youngest delegate to the 1934 Constitutional Convention, and Governor of Camarines), Agapito del Rosario (Mayor of Angeles, Pampanga), and José Abad Santos (Secretary of Justice and Chief Justice of the Supreme Court), all of whom were executed for refusing to swear allegiance to the Japanese Empire.