Vicereine
In the SCA, Vicereine is the unofficial title used for the female figurehead of a Crown Principality. Consequently, this title has no precedence and has no form of address. The male equivalent is a Viceroy.
A Vicereine is not allowed to wear any coronet of any kind as she is not considered as a ruler but a representative of the King under whose rule the land is.
Viceroy and/or Vicereine is also the title used for the ruling territorial nobility of the Crown Province of Ostgardr, in the East Kingdom, a group unique in the SCA with many special grandfathered rights, privileges and weirdnesses. The Viceroy/Vicereine of Ostgardr are treated in all ways as Barons/Baronesses and have precedence as the senior landed nobility of the East Kingdom.