Difference between Heir Presumptive and Grand Duchess

HEIR PRESUMPTIVE vs GRAND DUCHESS: NOUN

Someone who will inherit only if no better choice for an heir is born.
See heir apparent.
An heir who stands to inherit the estate, title, or office of an intestate ancestor, but whose claim can be defeated if a relative who is closer to the ancestor is born prior to the ancestor's death.
A person who expects to inherit but whose right can be defeated by the birth of a nearer relative

A daughter or granddaughter of a sovereign (czar or later emperor) of the Russian Empire or a pretender to the throne thereof.
Sometimes applied to render a grand prince's female spouse
Used as the title for such a noblewoman.
The daughter or granddaughter of a czar in the male line.
A woman who is the sovereign of a grand duchy.
The wife or widow of a grand duke.
The wife of a grand duke or a woman holding that rank in her own right

Succession, Peacock throne, Kingship, Dynastic, King, Prince consort, Princeling, Monarch, Figurehead, Prince regent, Coronation, Heir, Successor, Throne, Heir apparent

Holy roman empire, Princekin, Archduchess, Empress, Princesslike, Prince consort, Queen consort, Princess, Queen dowager, Archdukedom, Archducal, Queen regnant, Duchess, Female aristocrat, Archduchy

Succession, Peacock throne, Kingship, Dynastic, King, Prince consort, Princeling, Monarch, Figurehead, Prince regent, Coronation, Heir, Successor, Throne, Heir apparent

Holy roman empire, Princekin, Archduchess, Empress, Princesslike, Prince consort, Queen consort, Princess, Queen dowager, Archdukedom, Archducal, Queen regnant, Duchess, Female aristocrat, Archduchy

He is the son of Eliwood, the main character of Fire Emblem: The Blazing Blade, and heir presumptive of Pherae.
Frenchman, that he is not heir presumptive to another crown, and that he has previously taken the civic oath.
Prince Albert became King George VI and the young Princess Elizabeth became heir presumptive to the throne.
Known as "The Brat" in the Heraldic Circle, the Heir-presumptive lives up to her nickname.
Roger was made lieutenant of Ireland and was declared heir presumptive to the Crown.

The Grand Duchess went into exile accompanied by her family and the government.
She there painted a portrait of the Grand Duchess Marie of Russia.
Grand Duchess of the boss fights was able to act to.
Blythe first heard an aria of the Grand Duchess sung in concert by Frederica von Stade.
Russian Grand Duchess Anastasia and had survived the Romanov massacre.
Grand Duchess Olga Alexandrovna of Russia was his great-grandmother.
HRH The Hereditary Grand Duchess of Luxembourg (1981-2001).
Grand Duchess Olga was reportedly shy and subdued.
Grand Duchess Florianne de Chalons is the sister of Grand Duke Gaspard de Chalons.
Grand Duke Konstantine Konstantinovich of Russia and his wife Grand Duchess Elizabeth Mavrikievna.