What is the difference between a princess and a grand duchess?

Answer 1

They are equivalent ranks- western wise- Great Britain does not use the Grand Duchess rank, which was used by czarist Russia and also Imperial Austria. Some linguists have argued that Archduchess was a more accurate rendition for the Austrian Noblewomen. A Grand Duchess of Russia was both a Grand Duchess and a Crown Princess- or Czarevna. there were Grand Duchesses such as Elisabeth ( the sister of Czar Nicholas II) who were not Czarevnas- daughters of the Czar but were int he Horizontal or Fraternal linel. Generally the Grand Duchess ranks applied to the equivalent of Crown Princesses in the West. She should be addressed as Your Highness (Imperial Highness in formal occasions) and if under l8, as Anastasia was, (Your Grace). Dimitri got it right. Grace was NOT her middle name. Olga can be very loosely translated as something like Grace or Bounty, divine favor, however.