You will also find that some sororities have several symbols and that there is overlap.
For example: the "anchor" figures prominently in both Delta Gamma and Alpha Sigma Tau. Tri-Delta and Kappa Alpha Theta both have the "pansy" for their flower.
When you add them all up, there are a tonne of sororities: NPC, NPHC, professional, local, multicultural, etc., that I think you are bound to have some overlap somewhere.
Interesting topic!
