Nassau
Several places in the German-speaking area are named Nassau, but most places and things named Nassau ultimately derive their name from the town of Nassau on the Lahn in Rhineland-Palatinate, after which the region and the House of Nassau are named. In German, nass means "wet" and Au (more often written as Aue) can be a short form of either Flussaue (floodplain) or Auwald (riparian forest). It can also be used as a synonym for Feuchtwiese (wet meadow). Aue derives from Middle High German ouwe, which is related to the Latin aqua ("water").
Nassau may refer to:

Places
Austria
Nassau (Groß Sankt Florian), incorporated village of Groß Sankt Florian

Bahamas
Nassau, Bahamas, capital city of the Bahamas, on the island of New Providence

Canada
Nassau District, renamed Home District, regional division in Upper Canada from 1788 to 1792
Nassau Street (Winnipeg), Manitoba
Nassau Street, Toronto

Cook Islands
Nassau (Cook Islands), one of the Northern Cook Islands

Germany
Connected with Nassau, Rhineland-Palatinate
Nassau, Rhineland-Palatinate, a town founded in AD 915
Bad Ems-Nassau, collective municipality including the towns of Bad Ems and Nassau and its surrounding areas
Nassau Castle, the ancestral seat of the House of Nassau
Nassau (region), the broader geographical and historical region comprising the former independent country of Nassau
Nassau Nature Park, a major nature park in Germany located within the historical state of Nassau
County of Nassau, a German state within the Holy Roman Empire during the Middle Ages, or one of its many successor counties
Duchy of Nassau, an independent German state between 1806 and 1866 and the ultimate successor of the medieval county
Hesse-Nassau, a Prussian province formed following their annexation of the Duchy of Nassau (along with other territories)
Province of Nassau, a short-lived province of Nazi Germany (1944–1945) created from the formal division of Hesse-Nassau

Other Nassaus in Germany
Nassau (Frauenstein), incorporated village of Frauenstein in the Ore Mountains, Saxony
Nassau (landscape), landscape in the Meissen district
Nassau (Meissen), incorporated unpopulated place of Meissen, Saxony
Nassau (Offenberg), incorporated village of Offenberg, Bavaria
Nassau (Weikersheim), incorporated village of Weikersheim, Baden-Württemberg

Hong Kong
Nassau Street, Lai Chi Kok, Kowloon

Indonesia
Nassau, a subdistrict in Toba Samosir Regency, North Sumatra
Nassau Range, alternate name of the Sudirman Range in Indonesia

Ireland
Nassau Street, Dublin

Jamaica
Nassau Valley

Netherlands
Baarle-Nassau, a town in the southern Netherlands

Poland
Mokra (German: Mokrau, named Nassau O.S. 1936–1945)

Slovenia
Nasova (formerly German: Nassau in der Steiermark)

Taiwan
historic name for Taitung City

United States
Nassau, Delaware
Nassau County, Florida
Nassau Village-Ratliff, Florida
Nassau, Minnesota
Nassau, New York (disambiguation)
East Nassau, New York
Nassau (town), New York, in Rensselaer County
Nassau (village), New York
Nassau County, New York, on Long Island
Nassau Island, former name of Long Island
Nassau Lake in Rensselaer County
Nassau Lake, New York, corresponding census-designated place
Nassau Street (Manhattan), New York City
Nassau Street (Princeton, New Jersey)
Nassau Bay, Texas

People
Nobles
House of Nassau, a European aristocratic dynasty
House of Orange-Nassau, a noble dynasty from the Netherlands
Louis of Nassau (1538–1574), Dutch general
Maurice of Nassau, Prince of Orange (1567–1625), Dutch stadtholder
Sophia of Nassau (1836–1913), Queen consort of Sweden and Norway
William Nassau de Zuylestein, 4th Earl of Rochford (1717–1781), British courtier, diplomat, and statesman
House of Nassau-Siegen
John Maurice of Nassau (1604–1679), Dutch colonial governor
House of Nassau-Weilburg, a noble dynasty from Germany, monarchs of Luxembourg
Adolf of Nassau (disambiguation)
Adolph of Nassau-Weilburg (disambiguation)
Maria of Nassau (disambiguation)
William of Nassau (disambiguation)

Surname
Charles William Nassau (1804–1878), Presbyterian minister, president of Lafayette College

People with the given name
Nassau William Senior (1790–1864), English lawyer and economist

Ships
HMS Nassau, a UK Royal Navy name for many ships
HNLMS Johan Maurits van Nassau, ships of the Netherlands navy
MV Queen of Nassau, name of HMCS Canada after exiting government service
Nassau-class battleship, an Imperial German battleship class
SMS Nassau, a 1908 German battleship
SS Nassau, a steam turbine-driven twin-screw passenger-and-cargo ocean liner, launched in 1928
USS Nassau, a U.S. Navy ship name for multiple ships
Nassau (steamboat), the first steam ferry, built by Robert Fulton

Other uses
Nassau (album), a 1995 album by The Sea and Cake
Nassau (bet), a type of bet between golfers
Nassau (Staten Island Railway station), United States
Nassau Coliseum, an arena in Uniondale, New York, United States
Nassau Fjord, in Prince William Sound, Alaska
Nassau grouper, an endangered species of fish
Nassau Hall, Princeton University, New Jersey, United States
Nassau Light Railway, a German railway company
Nassauische Neue Presse, a German newspaper in the Nassau area
Nassau (crater), a lunar impact crater on the far side of the Moon
Nassau Club, a private club in Princeton, New Jersey, founded by Woodrow Wilson

See also
Battle of Nassau (disambiguation)
Fort Nassau (disambiguation)
Nassau County (disambiguation)
Nassau Street (disambiguation)
Orange-Nassau (disambiguation)