NationStates

While most heads of state are referred to simply as "King", "Queen", "President", etc, they usually also have a long ceremonial title. For example, Queen Elizabeth II has her full title as "Elizabeth II, by the Grace of God, of the United Kingdom of Great Britain and Northern Ireland and of her other realms and territories Queen, Head of the Commonwealth, Defender of the Faith".

What is your head of state's full title? Ours is "Mr. Matthew, by the Mandate of the People, the President of the Federal Republic of Nacrad, the Grand Marshal and Commander-in-Chief of the Armed Forces of the Federal Republic of Nacrad, the Leader of the Federal Republic and her Dependant Terrirories"

We always use "[...] her Dependant Territories" regardless of if the President is male or female, as the dependant territories belong to Nacrad, which is designated a feminine pronoun, instead of the President.

Her Majesty The Queen of Terabithya

or when Terabithya has a King His Majesty The King of Terabithya

The Lord Chancellor is His Excellence The Lord Chancellor, Prince of Terabithya

or in case the Chancellor is female Her Excellence The Lady Chancellor, Princess of Terabithya

If the Lord/Lady Chancellor belongs to the Royal Family they can also be addressed His/Her Highness.

Our head of state and government are different offices and both have a relatively long full official title, as well as shortened, simplified titles.

THE EMPEROR:

Full official title:
"His/Her Imperial Majesty, Emperor/Empress [regnal name] of Majapahit, Supreme Commander-in-chief of the Armed Forces, Divine Guardian of the Realm"
"His Imperial Majesty, Emperor Jayanagara VII of Majapahit, Supreme Commander-in-chief of the Armed Forces, Divine Guardian of the Realm"

Shortened title:
"His/Her Imperial Majesty, Emperor/Empress [regnal name]"
"His Imperial Majesty, Emperor Jayanagara VII"

THE PREMIER:

Full official title:
"His/Her Excellency, Premier [first & last name] of Majapahit"
"His Excellency, Premier Sri Indra Thohir of Majapahit"

Shortened title:
"His/Her Excellency, Premier [last name]"
"His Excellency, Premier Thohir"

Full Title: Grand Admiral (Lilliana Olivia Serena Miette Feylani), Grand Duchess of Lituevjia, Supreme Commander of the Armed forces, Head of the Senate, Blade of Justice, Defender of Peace, Savior of Liranaholm, the Unbroken (That sorta a lie, she's broken)

Princess Kyouko of Shikonjima uses the following title:

Yamura no Kyouko, Princess of Shikonjima, Viscountess of the Oui no Tochi, Highest Servant of the Four Souls, Highest Lady of the Kazoku.

The Oui no Tochi are the Crownlands, the territories immediate to the Principality (as opposed to Duchies, Counties, and Baronies), which she rules over more or less directly (formally by direct rule, but Regents and Councils are a thing).
'Highest Servant of the Four Souls' refers to the Main Gods of the Shikonjimanese national religion, the Shikon no Juuhai (Cult of the Four Souls). Before the takeover of the Warrior Clans in the 16th century, which Kyouko is a descendant of, Shikonjimanese Rulers used 'Descendant of the Four Souls' in order to reaffirm the divine justification of their rule. The Warrior Clans changed that.
The Kazoku is the 'Magnificent Lineage', the Shikonjimanese Royalty.

For a formal address, 'Her Royal Majesty', 'Her Royal Highness', or 'Koushaku-sama' is preferred.

The Empress' official title is "By the Grace of God, We, Natalia, Empress and Autocrat of Alaska", however she is usually addressed as "Her Imperial Majesty".

I guess ours is kinda short, because we're a republic.

(Name), President and Primus inter Pares of the Honorable Federal Council of the People's Union of Beatitas, and of the nation it justly leads, and of the peoples and lands whence the Federal Council obtains its mandate to serve them

The title for our leader since Mirial became a republic only 25 days ago is as follows: Presidente i Primer ko Pares - Embodimento della Rebolucione i Etsekutor del Voluntad de Deus, Petro Basileas

(President and First Among Equals - Embodiment of the Revolution and Enforcer of the Eternal Will of God, Petro Basileas)

As a Republic, we tend to have a short full title for our head of state.
Head and Supreme Commander of The Oceanic Commonwealth, Chief of State Jeffrey Jung
For the head of government which has a higher position, has a full title as the following :
Head of the Oceanic Senate, and the Executive of the Oceanic Commonwealth, Supreme Chancellor Primus

The Emperor's title:
"Her/his Imperial Majesty [EMPEROR/EMPRESS NAME], Constitutional Emperor/Empress by the grace of God, and unanimous acclamation from the people, Perpetual Defender of Brazil, Shield of the Americas, Guardian of the Latins and Heir to the Roman Glory."

"Her Imperial Majesty Ana Sofia, Constitutional Empress by the grace of God, and unanimous acclamation from the people, Perpetual Defender of Brazil, Shield of the Americas, Guardian of the Latins and Heir to the Roman Glory."

In Portuguese:

"Sua Majestade Imperial Ana Sofia, Imperatriz Constitucional pela graça de Deus, e unânime aclamação dos povos, Defensora Perpétua do Brasil, Escudo das Américas, Protetora dos Latinos e Herdeira da Glória Romana."

The shorter form "Her Imperial Majesty Ana Sofia" is preferred.

Prime Minister's title
"Her/his Excellency, President of the Council of Ministers, [Forename and surname]."

"His Excellency, President of the Council of Ministers, Eduardo Michalski."

In Portuguese:

"Sua Excelência, Presidente do Conselho de Ministros, Eduardo Michalski."

The shorter form "His Excellency, Eduardo Michalski" is preferred.

Atakheer Khan uses the following title:

Atakheer Khan, Lord of the Sharulsi Khanate, Father of the Steppes, Son of the Yellow Desert, Unifier of the Black Hordes.

It may occur, that for a monarch, Atakheer Khan doesn't have a particularly long title, which is a result of the relative simplicity, down-to-earthness, and touch with nature inherent to the Sharulsi culture, compared to many others. Especially the latter is the reason why it has been customary to include 'Son/Daughter of the Yellow Desert', the initial core land of what's now the Sharulsi Khanate, into the Ruler's title for a long time. 'Father of the Steppes' is a translation of the name he has given himself during his coronation ceremony, but is also considered the reaffirmation of the national unity, due to the steppe climate in huge chunks of the Khanate. 'Unifier of the Black Hordes' is a title carried by all Sharulsi Rulers as well, as a historical reference to Gantulga Khan, founder of the Sharulsi Empire in the Middle Ages.
'His Royal Majesty/Highness' is preferred as an address.

Root Processor is usually the identifier used for the function performed by Mainframe leaders. However, in some cases, a longer and more verbose title may be used, such as: Large-Scale Load Balancing, Task Assignment, and Administrative Node Designated As Root Processor.

Officially, it's Their Excellency, Karl Kaiser von Habsburg, the Federal President of the German Confederation.

His Imperial and Royal Apostolic Majesty Karl II and V and IV, By the Grace of the Gods and the Will of the People, Emperor of Auzkhia, King of the Romans, Forever August, President of the German Confederation, Apostolic King of Hungary, King of Bohemia, Slovakia, Dalmatia, Croatia, Slavonia, and Galicia, Lodomeria, Lombardy-Venetia, Bosnia-Herzegovina, and Illyria, King of the Rheinland and Westphalia; King of Jerusalem, Archduke of Auzkhia; Grand Duke of Tuscany and Cracow, Duke of Lorraine, and of Salzburg, of Styria, of Carinthia, of Carniola and of the Bukovina; Grand Prince of Transylvania; Margrave of Moravia; Duke of Upper and Lower Silesia, of Modena, Parma, Piacenza and Guastalla, of Auschwitz and Zator, of Teschen, Friuli, Ragusa and Zara; Princely Count of Habsburg and Tyrol, of Kyburg, Gorizia and Gradisca; Prince of Trent and Brixen; Margrave of Upper and Lower Lusatia and in Istria; Count of Hohenems, Feldkirch, Bregenz, Sonnenberg; Lord of Vienna, Trieste, of Cattaro and in the Windic March; Grand Voivode of Serbia. Sovereign of the Order of the Golden Fleece.

The head of state is nominally the federal president, however, the Emperor of Auzkhia has held that office since its inception, making our federal state an elective monarchy, since the head of state is elected by both houses of parliament. There is nothing requiring it, it's just that it's kinda expected. The Federal Presidency is largely ceremonial, and the Chancellor holds more executive power.

As Roegerland is part of the Commonwealth Realm...

Her Britannic Majesty, Elizabeth the Second, by the Grace of God, of the United Kingdom of Great Britain and Northern Ireland, and of her other Realms and Territories Queen, Head of the Commonwealth, Defender of the Faith.

PRESIDENT: President Petros Hagopian, Commander in Chief of the State of Haeykha and the Armenians

VICE PRESIDENT: Vice President Haig Nazaretyan, Second in Order of the State of Haeykha and the Armenians

Formula:
Full: Chief of the Incorporated States of Inner AginanaUsordia Executive Council *NAME*, Honorable Council*MAN/WOMAN* of *HOME PROVINCE*
Abbreviated: CISIA *LASTNAME*, *PROVINCE*
Examples: Chief of the Incorporated States of Inner AginanaUsordia Executive Council Dmitri Papaianache, Honorable Councilman of Surdanuba;
CISIA Papaianache, Surdanuba
Chief of the Incorporated States of Inner AginanaUsordia Executive Council Nicole Dimitrios, Honorable Councilwoman of Aginan Banlu;
CISIA Dimitrios, Aginan Banlu

The Honourable [NAME] AM, Mayor of Tinhampton.

President [Name]

The Honorable President [Name] Leader of Willitya and Notinaland, [Milllitary Rank, If Served] and Commander-In-Chief of the Millitary.

So our president would be: The Honorable President Jonathan Bourno, Leader of Willitya and Notinaland, Major and Commander-In-Chief of the Millitary.

Afonso Salazar's title is Civil Director of Portugal (Direitor Civil de Portugal) and his style is His Holy Excellency (Sua Sagrada Excelência).

Hannes II Rochus, by the Grace of God, Kaiser of the Holy Empire, Regent of Christ on Earth, and Dieresiarch Diarcesian

Alfonso Salamera, Su Excelencia, el Presidente de la República Acaya (His Excellency, the President of the Achaean Republic)

The full title for our current head of state and head of government (the two offices are combined in the Democratic Republic and are held by the same person) is:
Park Sang-Hee, Prime Minister of the Democratic Republic of Gandoor

Nantu's Head of State is, currently, "Her Royal Majesty, Emma Glasdon, Queen of the Commonwealth of Nantu and Sovereign of the Royal Colonies". She is more informally referred to as "Her Royal Majesty Emma Glasdon" or "Queen Emma". Nantu's Head of Government is, currently, "Prime Minister Ryan Harper". He is styled the "Right Honourable Prime Minister" officially, and informally, "Prime Minister Harper" or "Mr. Prime Minister". He retains the style "the Right Honourable Ryan Harper" for life. The current Deputy Prime Minister is "the Right Honourable Deputy Prime Minister Michelle Ambrose" and is more informally referred to as "Deputy Prime Minister Ambrose" or "Mrs. Deputy Prime Minister". She also retains the style "the Right Honourable Michelle Ambrose" for life.