Difference between Heir Presumptive and Equerry

HEIR PRESUMPTIVE vs EQUERRY: 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 personal attendant to a head of state, a member of a royal family, or a national representative.
An officer responsible for the care and supervision of the horses of a person of rank.
An officer of princes or nobles, charged with the care of their horses.
A large stable or lodge for horses.
An officer charged with supervision of the horses belonging to a royal or noble household.
A personal attendant to the British royal household.
An official charged with the care of the horses of princes or nobles
A personal attendant of the British royal family

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

Hrh, Viceroy, Prince, Brigadier, Duchess, Adjutant, Lord lieutenant, Royal, Colour sergeant, Viscountess, Courtier, Footman, Waiting, Horseman, Squire

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

Viceregal, Lieutenant, Queen consort, Prince consort, Viceroy, Prince, Brigadier, Duchess, Adjutant, Royal, Colour sergeant, Viscountess, Courtier, Waiting, Horseman

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.

Was appointed successively grand sword bearer, grand standard bearer, second grand equerry and grand master of ceremonies.
As agent or owner, I understand that the owner is financially responsible to Equerry for all applicable charges relating to this animal.
One influence for his interest in UFOs was his equerry, Sir Peter Horsley, whom he asked to follow up any credible reports of sightings.
The Queen's equerry is an officer from one of the armed services, who takes on the role for three years.
Park House on the Sandringham Estate; her father was an equerry to the Queen.
Meanwhile, her former equerry defended Channel 4's decision to broadcast the videos.
Grand Equerry Caulaincourt just a few hours after it ended.
Equerry to the King and has been in waiting.