Question: What princely family did the family in which the station motto for the RAF Mount Batten branch from?

full_context: Document 1: RAF Mount Batten: RAF Mount Batten was a Royal Air Force station and flying boat base at Mount Batten, a peninsula in Plymouth Sound, Devon, England. Originally a seaplane station opened in 1917 as a Royal Navy Air Service Station Cattewater it became RAF Cattewater in 1918 and in 1928 was renamed RAF Mount Batten. The station motto was "In Honour Bound" which is the motto of the Mountbatten family.
Document 2: Mann family: The Mann family is a German Hanseatic family, members of the small ruling class of the city republic of Lübeck. The family's most famous member is Nobel Prize for Literature laureate Thomas Mann, who portrayed his own family and social class in the novel "Buddenbrooks". The family became part of the commercial elite of Lübeck from the late 18th century. In 1877, Thomas Mann's father Thomas Johann Heinrich Mann was elected Senator of Lübeck (corresponding to Minister of Finance in other German states).
Document 3: RAF Mount Pleasant: RAF Mount Pleasant (IATA: MPN, ICAO: EGYP) (also known as Mount Pleasant Airport, Mount Pleasant Complex or MPA) is a Royal Air Force station in the British Overseas Territory of the Falkland Islands. The airfield goes by the motto of "Defend the right" (while the motto of the islands is "Desire the right") and is part of the British Forces South Atlantic Islands (BFSAI). Home to between 1,000 and 2,000 British military personnel, it is located about 33 mi southwest of Stanley, the capital of the Falklands—on the island of East Falkland. The world's longest corridor, half a mile (800 m) long, links the barracks, messes and recreational and welfare areas of the station, and was nicknamed the "Death Star Corridor" by personnel.
Document 4: Penlee Lifeboat Station: Penlee Lifeboat Station is the base for Royal National Lifeboat Institution (RNLI) search and rescue operations for Mount's Bay in Cornwall, United Kingdom. The lifeboat station operated at various locations in Penzance from the early 19th century. It moved to Penlee Point near Mousehole in 1913, thus gaining its current name, but was moved to Newlyn in 1983 without any change of name. The station is remembered for the loss of the entire lifeboat crew on 19 December 1981.
Document 5: House of Hatzfeld: The House of Hatzfeld, also spelled Hatzfeldt, is a prominent German Countly and Princely family. They belonged to high nobility originally from Hesse. The family is first mentioned in 1138 and has its ancestral seat in Hatzfeld. In 1418 the family inherited Wildenburg Castle near Friesenhagen, a Lordship with Imperial immediacy, from the Lords of Wildenburg.
Document 6: Countess Mountbatten of Burma: Countess Mountbatten of Burma is a peerage in the United Kingdom encompassing certain of the wives and daughters of the Earl Mountbatten of Burma. The family seat for the position is at Newhouse Manor, near Ashford, Kent.
Document 7: Battenberg family: The Battenberg family was formally a morganatic branch of the House of Hesse-Darmstadt, rulers of the Grand Duchy of Hesse in Germany. The first member was Julia Hauke, whose brother-in-law Grand Duke Louis III of Hesse created her "Countess of Battenberg" with the style "Illustrious Highness" (H. Ill.H.) in 1851, at her morganatic marriage to Grand Duke Louis' brother Prince Alexander of Hesse and by Rhine, and elevated her title to "Princess of Battenberg" with the style "Serene Highness" (HSH) in 1858. The name "Battenberg" was last used by her youngest son, Prince Francis Joseph of Battenberg, who died childless in 1924. Most members of the family, residing in the United Kingdom, had renounced their German titles in 1917, due to rising anti-German sentiment among the British public during World War I, and changed their name to "Mountbatten", an anglicised version of Battenberg. The name Battenberg refers to the town Battenberg, Hesse.
Document 8: Mountbatten family: The Mountbatten family is a European dynasty originating as a branch of the German princely Battenberg family. The name was adopted during World War I by family members residing in the United Kingdom due to rising anti-German sentiment amongst the British public. The name is an Anglicisation of the German Battenberg, a small town in Hesse. The title of count of Battenberg, later prince of Battenberg, was granted to a morganatic branch of the House of Hesse-Darmstadt, itself a cadet branch of the House of Hesse, in the mid 19th century.
Document 9: Mount Batten: Mount Batten is a 24-metre-tall outcrop of rock on a 600-metre peninsula in Plymouth Sound, Devon, England, named after Sir William Batten (c.1600-1667), MP and Surveyor of the Navy.
Document 10: Plymouth City Airport: Plymouth City Airport (IATA: PLH, ICAO: EGHD) is a 'mothballed' airport located within the City of Plymouth 3.5 NM north northeast of the city centre in Devon, England at Roborough. The airport opened on this site in 1925 and was officially opened by the future Edward VIII, as Prince of Wales, in 1931. The airport is located close to the city centre and has a modern terminal.
Document 11: Barnard: Some of the Barnard family in England may have been Huguenots who fled from the Atlantic coast region of France "circa" 1685 (the time of the revocation of the edict of Nantes) or earlier than that date, however the evidence for this is tenuous, as the name does not appear in lists of proven Huguenot names. By contrast, the Barnard family in Holland (the western provinces of the Netherlands) can be definitively traced back to "circa" 1751 (Izaak Barnard) of Scheveningen. The countries from which they entered Holland prior to that date are uncertain. The Jewish branch of the Barnard family in England is well documented, and is thought to have arrived in England and Ireland, after the time of the readmission of Jews by Oliver Cromwell (1656); some of whom can be traced back to Rabbi Daniel Barnard of Canterbury, with notable descendants around London, Chatham, Dartford, Kingston upon Hull, Stockton-on-Tees, Bournemouth, Ipswich, Norwich and in Australia.
Document 12: Mountbatten Institute: The Mountbatten Institute (formerly known as the Mountbatten Internship Programme) is an organization based in New York and London dedicated to fostering work experience and cultural exchange by placing international graduate students abroad to earn postgraduate certificates and degrees. Named in honour of Louis Mountbatten, 1st Earl Mountbatten of Burma and benefacted by his eldest daughter Patricia, 2nd Countess Mountbatten, the organization was founded in 1984.
Document 13: Prince Maurice of Battenberg: Prince Maurice of Battenberg, KCVO, (Maurice Victor Donald; 3 October 1891 – 27 October 1914) was a member of the Hessian princely Battenberg family and the extended British Royal Family, the youngest grandchild of Queen Victoria. He was known as Prince Maurice of Battenberg throughout his life, since he died before the British Royal Family relinquished their German titles during World War I and the Battenbergs changed their name to Mountbatten.
Document 14: Mountbatten Medal: The IET Mountbatten Medal is awarded annually for an outstanding contribution, or contributions over a period, to the promotion of electronics or information technology and their application. The Medal was established by the National Electronics Council in 1992 and named after Louis Mountbatten, The Earl Mountbatten of Burma, Admiral of the Fleet and Governor-General of India. Since 2011, the medal has been awarded as one of the IET Achievement Medals.
Document 15: Navy Region Southeast: CNRSE's motto is "Where the Atlantic Fleet and the Navy's Air Training Command come to train", It gets this motto from the fact that its installations are home to both the Naval Air Training Command located at Naval Air Station Corpus Christi and Naval Education and Training Command, which has its headquarters at Naval Air Station Pensacola. The region's installations also host the United States Navy Flight Exhibition Team, more commonly known as the Blue Angels, which for a brief stint in the late 1940s were under what was then the NAval Air Advanced Training Command.
ground_truth: Battenberg family