Final answer:
There is no recognized Greek-letter organization named Pi Delta Delta. The question may refer to fraternities and sororities within the National Pan-Hellenic Council, such as Alpha Kappa Alpha, established in 1908 at Howard University.
Step-by-step explanation:
The question about the founders of Pi Delta Delta and the year it was founded seems to be directed toward a potential Greek-letter organization. However, there is no widely recognized Greek-letter organization by the name of Pi Delta Delta. Instead, the question might be referring to historically significant fraternities and sororities within the context of the National Pan-Hellenic Council (NPHC), which is the collaborative organization of nine International Greek fraternities and sororities, sometimes referred to as the 'Divine Nine.'
One notable organization under the NPHC is Alpha Kappa Alpha Sorority, Inc., which was the first Black women's intercollegiate Greek organization founded at a Black university. Alpha Kappa Alpha was established in 1908 at Howard University in Washington, D.C. This sorority boasts prestigious members such as Kamala Harris, Toni Morrison, and Phylicia Rashad. The query might be directed in error or confusion, targeting the history and founding of notable Greek organizations, commonly studied for collegiate history or Greek life education.