Mergers between two Greek groups

[irishpipes]

oldu, several NPC groups did merge.

Theta Sigma Upsilon --> Alpha Gamma Delta
Phi Omega Pi --> Alpha Omicron Pi
Pi Kappa Sigma --> Sigma Kappa
Theta Upsilon --> Delta Zeta
Alpha Delta Theta --> Phi Mu
Beta Phi Alpha --> Delta Zeta
Beta Sigma Omicron --> Zeta Tau Alpha
Delta Sigma Epsilon --> Delta Zeta

And one NPC sorority, Iota Alpha Pi, dissolved in 1971 without merging or being absorbed by another NPC.