Nicholas Hannen may refer to:
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Athene Seyler, CBE was an English actress.
The Sunday People is a British tabloid Sunday newspaper. It was founded as The People on 16 October 1881.
Hermione Hannen was an English theatre and film actress. She was born in London, the daughter of Nicholas "Beau" Hannen, who was also an actor on the stage and in film.
James Hannen, Baron Hannen, PC, FRS was an English judge.
Wargrave is a large, historic village and civil parish in Berkshire, England. The village is primarily on the River Thames but also along the confluence of the River Loddon. Wargrave is situated in the A321 road 7 miles (11 km) from both Maidenhead and Reading and 3 miles (4.8 km) from Henley-on-Thames. The village is larger than the county average, having a railway station on the Henley Branch Line, off the Great Western main line from London Paddington; the village is quickly accessible to nearby parts of the M4 corridor, particularly Berkshire and Heathrow Airport and local major centres of employment include Reading and Maidenhead, with smaller businesses and additional commercial facilities in nearby Henley-on-Thames and Wokingham. The village has many old listed buildings, two marinas with chandlery services for boats, a rowing club and rises steeply to the northwest in the direction of Bowsey Hill, with higher parts of the village generally known as Upper Wargrave. In Upper Wargrave is a Recreation Ground with a cricket club, bowls club, football pitch and tennis club.

Frederick Charles Hannen Swaffer was an English journalist and drama critic. Although his views were left-wing, he worked mostly for right-wing publications, many of them owned by Lord Northcliffe. He was a proponent of spiritualism, and an opponent of capital punishment.
Who Killed John Savage? is a 1937 British mystery film directed by Maurice Elvey and starring Nicholas Hannen, Barry MacKay, Kathleen Kelly, Henry Oscar and Edward Chapman. The film is based on a novel by Philip MacDonald and is a remake of the 1932 Michael Powell-directed film Rynox.
Marigold is a 1938 British drama film directed by Thomas Bentley and starring Sophie Stewart, Patrick Barr, Phyllis Dare, Edward Chapman and Pamela Stanley. The film was set in Scotland in the Victorian era. It was filmed in Edinburgh. It was based on a 1914 play of the same title by Lizzie Allen Harker and Francis R. Pryor.
The Man They Couldn't Arrest is a 1931 British crime film directed by T. Hayes Hunter and starring Hugh Wakefield, Gordon Harker, Garry Marsh and Dennis Wyndham. It was made at Islington Studios.
Hail and Farewell is a 1936 British comedy film directed by Ralph Ince and starring Claude Hulbert. The film was a quota quickie production, following the escapades of a group of British sailors during six hours' shore leave in Southampton. More specific plot details are unknown, as there is no evidence of the film being shown after its first run, the British Film Institute has been unable to locate a print for inclusion in the BFI National Archive, and the film is classified as "missing, believed lost".
Spy for a Day is a 1940 British comedy thriller film directed by Mario Zampi and starring Douglas Wakefield, Paddy Browne and Jack Allen. The screenplay concerns a British farmer who is abducted by the Germans during World War I.

Sir Nicholas John Hannen was a British barrister, diplomat and judge who served in China and Japan. He was the Chief Justice of the British Supreme Court for China and Japan from 1891 to 1900 and also served concurrently as Consul-General in Shanghai from 1891 to 1897. He was judge of the British Court for Japan from 1881 to 1891. He was the brother of James Hannen, a noted British judge of the 19th century. His son, Nicholas "Beau" Hannen was a famous actor of the early and mid-20th century.
Nicholas James "Beau" Hannen OBE (mil) was a British actor of the early and mid-20th century who acted in a number of stage plays and films.
Hannen is a surname. Notable people with the surname include:
The British Court for Japan was a court established in Yokohama in 1879 to try cases against British subjects in Japan, under the principles of extraterritoriality. The court also heard appeals from British consular courts in Japan. Appeals from the British Court for Japan lay to the British Supreme Court for China and Japan based in the Shanghai International Settlement.

Sir Richard Temple Rennie was a British barrister and judge who served in China and Japan. He was the Chief Justice of the British Supreme Court for China and Japan from 1881 to 1891. He was judge of the British Court for Japan from its creation in 1879 to 1881.
Late Extra is a 1935 British crime film directed by Albert Parker and starring James Mason, Virginia Cherrill, and Alastair Sim.
Murder at the Inn is a 1934 British crime film directed by George King and starring Wendy Barrie, Harold French and Jane Carr. It was a quota quickie, made at Teddington Studios by the British subsidiary of Warner Brothers.
The Hannen Columbarium is a columbarium mausoleum – a resting place for the cremated remains of the deceased – built for the Hannen family of Wargrave, Berkshire, England and designed by Edwin Lutyens.
Isobel Hannen is a Scottish curler and curling coach.