By the 13th century the following major districts had developed in Estonia: Saaremaa (Osilia), Läänemaa (Rotalia or Maritima), Harjumaa (Harria), Rävala (Revalia), Virumaa (Vironia), Järvamaa (Jervia), Sakala (Saccala), and Ugandi (Ugaunia).
The name Vironia was also chosen for a popular Estonian academic fraternal corporation, which was established in 1900 in Riga, Latvia and currently has representation in Tartu, Tallinn, Toronto, the American East and West coasts and Australia.