Not looking at other answers.
1. I can only think of Chi Omega
2. Pi Phi, ADPi, Alpha Phi, GPhiB, Theta, Sigma Kappa, DG, Kappa, Tri Delt, Alpha Xi Delta, Chi Omega, AOII, Kappa Delta, Zeta...?
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@>----'---,---- Alpha Omicron Pi -----Phi Beta Kappa ------
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