Tsarevna
Tsarevna (Царевна) was the daughter of a Tsar of Russia before the 18th century. The name is meant as a daughter of a Tsar, or as a wife of a Tsarevich.
All of them were unmarried, except for the daughters of Ivan V, who were born in the late 17th century, and grew old in convents or in the Terem Palace.