Noun
the wife of a grand duke or a woman holding that rank in her own right
Source: WordNetMy personal favorite in the Queen’s collection of glamorous headdresses is the Vladimir tiara, originally owned by the Grand Duchess Vladimir, the last of the Romanov dynasty. Source: Internet
The animated film stars Meg Ryan and centers around an eighteen-year-old amnesiac orphan named Anya who, in hopes of finding some trace of her family, sides with con men who wish to take advantage of her likeness to the Grand Duchess. Source: Internet