Difference between Heir Presumptive and Archduchy

HEIR PRESUMPTIVE vs ARCHDUCHY: 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

The archduchies Austria and Brabant (as well as its rival Gelre) claimed this rare, primordial vassalitic rank as the successors to the former Carolingian kingdom and first archduchy Lotharingia (the name later became Lorraine), which had been divided in an Upper - and a Lower dukedom within the Holy Roman Empire
The territority (principality) of an archduke
The territory of an archduke or archduchess.
The territory or rank of an archduke or archduchess.
The territory over which an archduke or an archduchess has authority.
The domain controlled by an archduke or archduchess

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

Ducal, Prince, Henry vii, Queen regnant, Earl marshal, Hapsburg, Duchy, Starosty, Habsburg, Archduchess, Burggrave, Landgraviate, Holy roman empire, Grand duchess, Archdukedom

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

Ducal, Prince, Henry vii, Queen regnant, Earl marshal, Hapsburg, Duchy, Starosty, Habsburg, Archduchess, Burggrave, Landgraviate, Holy roman empire, Grand duchess, Archdukedom

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 former occupies the eastern, the latter the western portion of the archduchy.
Contemptuously poltroonish pfennigs will have been extremly adnominally venodilated per the archduchy.
The Archduchy of Austria created, with sovereign power, by Frederick III.