grand duchess

the wife or widow of a grand duke.

a woman who governs a grand duchy in her own right.

a daughter of a czar or of a czar's son.

Origin of grand duchess

First recorded in 1750–60

In 1838 he was given the title of grand-ducal councillor and appointed librarian to the grand-duchess.

Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 |Various
The Grand-duchess, who can be as catty as they make 'em, had her secretary sit behind a screen to take stenographic notes.

Secret Memoirs: The Story of Louise, Crown Princess |Henry W. Fischer
Stephanie was the grand-daughter of this couple, and as Grand-Duchess of Baden was beloved and respected, and lived on until 1860.

Napoleon's Letters to Josephine |Henry Foljambe Hall
In any event, the Grand-Duchess happened to have for music-teacher a good-looking young German who took her fancy.

Eden |Edgar Saltus

The Grand-Duchess of somewhere did something, or didn't do it—I forget which—that was or was not "due to her."

The Dodd Family Abroad, Vol. II.(of II) |Charles James Lever

grand duchess

the wife or a widow of a grand duke

a woman who holds the rank of grand duke in her own right