Style (manner of address) in the context of "Lord Mayor of London"

A monarch is the head of a monarchy, a form of government in which a state is ruled by an individual who normally rules for life or until abdication, and typically inherits the throne by birth. Monarchs may be autocrats (as in all absolute monarchies) or may be ceremonial figureheads, exercising only limited or no reserve powers at all, with actual authority vested in a legislature and/or executive cabinet (as in many constitutional monarchies). In many cases, a monarch will also be linked with a state religion. Most states only have a single monarch at any given time, although a regent may rule when the monarch is a minor, not present, or otherwise incapable of ruling. Cases in which two monarchs rule simultaneously over a single state, as is the current situation in Andorra, are known as coregencies.

A variety of titles are applied in English; for example, "king" and "queen", "prince" and "princess", "grand duke" and "grand duchess", "emperor" and "empress". Although they will be addressed differently in their local languages, the names and titles in the list below have been styled using the common English equivalent. Roman numerals, used to distinguish related rulers with the same name, have been applied where typical.

An honorific is a title that conveys esteem, courtesy, or respect for position or rank when used in addressing or referring to a person. Sometimes, the term "honorific" is used in a more specific sense to refer to an honorary academic title. It is also often conflated with systems of honorific speech in linguistics, which are grammatical or morphological ways of encoding the relative social status of speakers. Honorifics can be used as prefixes or suffixes depending on the appropriate occasion and presentation in accordance with style and customs.

Typically, honorifics are used as a style in the grammatical third person, and as a form of address in the second person. Some languages have anti-honorific (despective or humilific) first person forms (expressions such as "your most humble servant" or "this unworthy person") whose effect is to enhance the relative honor accorded to the person addressed.

The prime minister of Canada is the head of government of Canada. Under the Westminster system, the prime minister governs with the confidence of a majority of the elected House of Commons; as such, the prime minister typically sits as a member of Parliament (MP) and leads the largest party or a coalition of parties. As first minister, the prime minister selects ministers to form the Cabinet.

Not outlined in any constitutional document, the prime minister is appointed by the monarch's representative, the governor general, and the office exists per long-established convention. Constitutionally, executive authority is vested in the monarch (who is the head of state), but the powers of the monarch and governor general are nearly always exercised on the advice of the Cabinet, which is collectively responsible to the House of Commons. Canadian prime ministers are appointed to the Privy Council and styled as the Right Honourable (French: le très honorable), a privilege maintained for life.

In the United Kingdom, life peers are appointed members of the peerage whose titles cannot be inherited, in contrast to hereditary peers. Life peers are appointed by the monarch on the advice of the prime minister. With the exception of the Dukedom of Edinburgh awarded for life to Prince Edward in 2023, all life peerages conferred since 2009 have been created under the Life Peerages Act 1958 with the rank of baron. Such peerages entitle (or perhaps obligate) the holder to sit and vote in the House of Lords (so long as they meet qualifications such as age and citizenship). Prior to 2009, life peers of baronial rank could also be created under the Appellate Jurisdiction Act 1876 for senior judges, referred to as Law Lords, with functions then taken over by the new Supreme Court.

The legitimate children of a life peer appointed under the Life Peerages Act 1958 are entitled to style themselves with the prefix "The Honourable", although they cannot inherit the peerage.

The deputy prime minister of Albania (Albanian: Zëvendëskryeministri i Shqipërise), officially styled the deputy prime minister of the Republic of Albania (Albanian: Zëvendëskryeministri i Republikës së Shqipërisë), is the deputy head of government of Albania. In the absence of the prime minister, the deputy prime minister takes over the functions of chairman of the council of ministers. The office is the second senior minister of the cabinet in the executive branch of the government in the parliamentary system in the Republic of Albania.

Although Albania has always had a deputy prime minister since its independence in 1912. A prime minister may choose not to appoint a deputy prime minister. As per the Constitution of Albania, the president of Albania appoints the deputy prime minister and swears before starting duties in front of the President. The deputy prime minister can take the position of acting prime minister, when the prime minister is temporarily absent or incapable of exercising its executive power. The deputy prime minister is often asked to succeed the prime minister's term of office, following the prime minister's sudden death or unexpected resignation. However, that is not necessarily mandated by the Constitution of the nation.

Hereditary titles, in a general sense, are nobility titles, positions or styles that are hereditary and thus tend or are bound to remain in particular families.

Though both monarchs and nobles usually inherit their titles, the mechanisms often differ, even in the same country. The British crown has been inheritable by women since the medieval era (in the absence of brothers), while the vast majority of hereditary noble titles granted by British sovereigns are not inheritable by daughters.

Ecclesiastical titles are the formal styles of address used for members of the clergy.