[FuzzieAlum]

Tom, Sigma was helped in its founding by AEPi, so I think you're mistaken about where their name came from.

From their site:
Alycia looked for a name that would have some significance in Judaism, something that might spell a word in Hebrew, or that might be a significant number. However, as so many Greek names were already taken, Alycia and Erin decided to pay homage to the organization that helped Sigma get its start, AEP. The "Sigma" in our name is meant to represent "sisters of," making us the sisters of AEP.