Eta² Hydri b was created in 2005.
ETA was created in 1959.
ETA SA was created in 1793.
Eta Sigma Phi was created in 1924.
Phi Eta Kappa was created in 1906.
Eta Gamma Delta was created in 1928.
Zeta Omega Eta was created in 2003.
Chi Eta Phi was created on 1932-10-16.
Alpha Eta Mu Beta was created in 1979.
Phi Rho Eta was created on 1994-08-22.
Eta Kappa Nu was created on 1904-10-28.
Alpha Eta Rho was created on 1929-04-10.
Kappa Eta Kappa was created on 1923-02-10.