My older sister was the first in our family, then the oldest sister followed suit and became a charter member of another sorority. Then I came in. Some of our cousins became members, too, and hubby and MIL are also Greek; I'll try and remember them all:
Oldest sister: Phi Beta Chi
Middle sister: Kappa Kappa Gamma
me (youngest): Kappa Kappa Gamma
Cousin 1: Alpha Gamma Rho
Cousin 2: Alpha Gamma Rho
Cousin 3: Sigma Alpha
Cousin 4: Theta Chi (I think)
Cousin 5: Beta Sigma Psi
Hubby: Alpha Tau Omega
MIL: Chi Omega
I have a 6-month-old niece that we're already grooming for Kappa (my sister was holding her as all us Kappas serenaded my hubby at our wedding) and I can't wait to hopefully have a girl of my own to teach about Greek Life!