Chamberlain (office)
A chamberlain (Medieval Latin: cambellanus or cambrerius, with charge of treasury camerarius) is a senior royal official in charge of managing a royal household. Historically, the chamberlain superintends the arrangement of domestic affairs and was often also charged with receiving and paying out money kept in the royal chamber. The position was usually awarded as an honour to a high-ranking member of the nobility (nobleman) or the clergy, often a royal favourite. Roman emperors appointed this officer under the title of cubicularius. The Chamberlain of the Holy Roman Church enjoys very extensive powers, having the revenues of the papal household under his charge. As a sign of their dignity, chamberlains bore a key, which in the seventeenth century was often silvered, and actually fitted the door-locks of chamber rooms. Since the eighteenth century, it has turned into a merely symbolic, albeit splendid, rank-insignia of gilded bronze. In many countries there are ceremonial posts associated with the household of the sovereign. Description
Historically, many institutions and governments – monasteries, cathedrals and cities – also had the post of chamberlain, who usually had charge of finances. The Finance Director of the City of London is still called the Chamberlain, while New York City had a chamberlain who managed city accounts until the early 20th century. Etymology
From the Old French chamberlain, chamberlenc, Modern French chambellan, from Old High German Chamarling, Chamarlinc, whence also the Medieval Latin cambellanus, camerlingus, camerlengus; Italian camerlingo; Spanish camerlengo, compounded of Old High German Chamara, Kamara [Latin camera, “chamber”], and the German suffix -ling. Posts
Some of the principal posts known by this name:

Austria
 Kammerherr, or Kämmerer (with a charge of finances, treasury)

Brunei
Grand Chamberlain of The Councils of Brunei titled as Yang Amat Mulia Pengiran Penggawa Laila Bentara Istiadat Diraja Dalam Istana. The current Grand Chamberlain is Pengiran Haji Alauddin Pengiran Paduka Tuan Pengiran Haji Abu Bakar. Around the year of 2012, The Grand Chamberlain of The l, Alauddin bin Abu Bakar, on emergency broadcast had announced the divorce between the Sultan and his third wife. June 7, 2015. The Grand Chamberlain of Brunei announced the newborn prince of Deputy Sultan, Crown Prince of Brunei. Byzantine Empire
Koubikoularios
Parakoimomenos
Praepositus sacri cubiculi

Denmark
Hofmarskallen (Court Marshal)
Kammerherre
Kammerdame
Lord Chamberlain of Denmark

France
Grand Chamberlain of France
Grand Chamberman of France

Germany
Kammerherr, or Kämmerer (with a charge of finances, treasury)

Holy Roman Empire 
Kammerherr, or Kämmerer (with a charge of finances, treasury)
Reichskämmerer (imperial chamberlain)
 Lord Chamberlain of the Archduchess

Japan
Grand Chamberlain of Japan and Chamberlain of Japan

Norway
Lord Chamberlain of Norway

Poland
Podkomorzy

Portugal
Chamberlain-Major of Portugal
Chamberlain of the Prince of Portugal

Roman Empire
Admissionales
Praepositus sacri cubiculi
Cubicularius

Russian Empire
Ober-Kammerherr or Kammerherr (}. Historically, postelnichiy (постельничий) was the ceremonial post at the court of a Grand Duke. Later, in 1772, at the court of the Tsar the German term Kammerherr was introduced. The Ober-Kammerherr was responsible for the audiences granted to members of the Royal Family. Since the beginning of the 18th century, the Ober-Kammerherr was the most senior appointed official of the Russian Imperial Court associated with the household of the sovereign. The most notable figures were: 
Prince Alexander Danilovich Menshikov 1727 - 1728
Prince  1730 - 1740
Duke Ernst Johann von Biron 1730 - 1740
Count Pyotr Borisovich Sheremetev 1761 - 1768
Boris Vladimirovich Stürmer 1916 - 1917, the last Ober-Kammerherr of Tsar Nicholas II. Serbia in the Middle Ages
Kaznac

Sweden
In Sweden there are ten serving chamberlains () and four serving cabinet chamberlains (kabinettskammarherrar) at the royal court. The chamberlains are not employed by the court but serve during ceremonial occasions such as state visits, audiences, and official dinners. Thailand
In Thailand the head of the Bureau of the Royal Household is titled the Lord Chamberlain (เลขาธิการพระราชวัง). He has several Grand Chamberlains as his deputy, usually in charge of a specific portfolio. United Kingdom
Lord Great Chamberlain (one of the Great Officers of State)
Lord Chamberlain (senior executive Officer of the Royal Household)
Chamberlain of the City of London (a High Officer of the City Corporation, its Director of Finance. The appointment of a City Chamberlain is first recorded in 1276; his duties related to the City Chamber, where monies were kept. He also presided over the admission of Freemen of the City of London, and continues to do so today.) Chamberlain of the Exchequer, treasury official in the English Exchequer
Lord Chamberlain of Scotland (a historic Office of State in the Kingdom of Scotland from 1124 to 1703)

United States
Chamberlain of the City of New York

Vatican
Camerlengo of the Holy Roman Church
Papal Gentleman (formerly known as Papal Chamberlain (Cameriere di spada e cappa))

See also
Court appointment
Hajib, a similar post in Muslim monarchies

References

Positions of authority
Government occupations
Court titles
Monarchy and money