The Tau Gamma Sigma - Triskelion Grand Sorority was originally founded on the 17th day of January in the year 1969 at the University of the Philippines, by a group of 10 Triskelion Lady Founders. Although known to the majority of the members that the Tau Gamma Sigma was founded on January 18, 1971 and was recognized by Sister O. Jose of the University of Santo Tomas on April 16, 1971. This historical background is an error and is now discredited due to facts and evidences that the Tau Gamma Sigma National Interim Committee and all Metro Manila Regional Councils have lately discovered through extensive research, investigations and interviews done to pioneering sisters of the sorority that the original founding history of the Tau Gamma Sigma can be traced back to 1969 at the University of the Philippines, Diliman campus, in Quezon City, Metro Manila Philippines.

This confusion may be attributed to the fact that the Tau Gamma Sigma was known then in it's earlier existence by a different name and much of the early history surrounding the foundation of the sorority was never documented and recorded by the pioneer members. It is common knowledge among the old scions and students of the University of the Philippines in Diliman in the late 60's that the Tau Gamma Sigma was used to be known as the "Sedarum Saudara Sorority". Sedarum Saudara is an all female organization formed by the brothers of the Tau Gamma Phi Fraternity. A fraternity also based and established in the University of the Philippines in Diliman in 1968, a year before the Sorority was founded.

Sedarum Saudara - Birth of the Lady Triskelions

The formation of the organization was born out of necessity, because during those times the fraternity was not even a year old and just in it's infant stage of existence in the campus, and their main focus is on recruiting male students and setting a foothold in the university, so they are not yet kin to the idea of having a Co-ed society, but since a lot of female students are friends and hanging around, supporting and attending social functions and gatherings with the Triskelion brothers that they quickly learned that having female members can be beneficial to the Fraternity especially in the recruitment of male members. So they decided to gather all their female friends and classmates to form an all female organization that will be their partner in pushing for their school and community service programs of pursuing their goal of educational excellence.

And so on January 17, 1969, "The Lady Triskelions" were born, although the name Sedarum Saudara Sorority or "SSS" was first chosen to mark the formation of a new organization in the campus, it quickly became one of the most popular sorority in UP. Derived from the Indonesian language of Bahasa, which means; "we are sisters" or "us, sisters". The Sorority was composed of the "beauty and brains" of the UP Diliman campus' female students during those times. Some of which will go on and become the future shakers and movers of Philippine society, such as the incumbent Mayor of Marikina City, Honorable Mayor Marides Fernando, the Honorable Associate Justice of the Philippine Court of Appeals, Associate Judge Rosmari Carandang, the Ambassadress of the Philippines to Switzerland and Norway, Ambassador Victoria Bataclan, the Commissioner of the Commission on Elections, Cmsr. Luzviminda Tanchangco, the Bureau of Internal Revenue (Philippines) Deputy Commissioner, Cmsr. Lucita "Babes" Rodriguez, and the "Ranillo Sisters", the pretty Lilibeth Ranillo and movie and television actress Suzette Ranillo, siblings of Philippine movie actor Mat Ranillo III.

The Greek Connection

Two years later, a day after it's 2nd Anniversary on January 18, 1971, to be truly affiliated to the Fraternity that helped form them through a common bond of interests and principles a couple of years ago, the Tau Gamma Phi, and also to be finally identified to the then fashionable trend of Greek Lettered Organizations that was popular among the studentry, the sisters of the Sorority dropped their Indonesian name and decided to be Greek, which resulted to the renaming of the Sorority by adapting the letters Tau "Т", Gamma "Γ" and Sigma "Σ" from the Greek alphabet, which stands for Triskelion Grand Sorority, they are now officially the sister organization of the Triskelion Grand Fraternity, the Tau Gamma Phi, and henceforth shall be called and known as The Lady Triskelions, and the rest is history.