Question: Where is the headquarters for the cognac house that Merlin D'Souza was the Asian Jazz ambassador for?

Context paragraphs:
Braastad: Braastad is a brand of cognac.  It's a range of product from the cognac House Tiffon.  The name Braastad was introduced when Sverre Braastad (1879 – 1979) from Gjøvik, Norway, married the daughter of cognac producer Tiffon, Edith Rousseau, in 1913, and took over Tiffon, founded by Médéric Rousseau in 1875.  The home of Braastad and Tiffon is Château de Triac.  It is situated in the cru Petite Champagne in the cognac area, France.

Otard: Otard, also known as Chateau de Cognac, is a French cognac house founded in 1795 by Jean-Baptiste Antoine Otard.  The company has remained in the hands of the same family since its establishment.  The firm is based in the Château des Valois (Château de Cognac), Cognac, Charente, its home since 1796.

Mark Izu: Mark Izu is an American jazz double bass player and composer.  He is of Japanese ancestry and frequently combines jazz with Asian traditional musics (particularly the ancient Japanese court music known as "gagaku") in his compositions.  He has performed with Anthony Brown and Jon Jang.  Izu is a seminal leader in the Asian American Jazz movement.  His compositions include symphony, film, theater, dance and jazz.  The principal curator of the original Asian American Jazz Festival held at the Asian Art Museum in San Francisco’s Golden Gate Park for nearly two decades, he helped establish the genre.  In addition to the double bass, he also plays the Japanese "shō" and Chinese "sheng" (both mouth organs).

The Real Ambassadors: The Real Ambassadors is a jazz musical developed in the late 1950s and early 1960s by Dave and Iola Brubeck, in collaboration with Louis Armstrong and his band.  It addressed the Civil Rights Movement, the music business, America’s place in the world during the Cold War, the nature of God, and a number of other themes.  It was set in a fictional African nation called Talgalla, and its central character was based on Armstrong and his time as a jazz ambassador.

Neville D'Souza: Neville Stephen J. D'Souza (3 August 1932 – 16 March 1980) was an Indian footballer who represented his nation at the 1956 Summer Olympics, where he became the first Asian player to score a hat-trick in an Olympic Games.  D'Souza finished the tournament as joint top-scorer, with 4 goals in 3 games.  D'Souza played club football for Bombay.

Annette A. Aguilar: Annette A. Aguilar (born 1957) is an American percussionist, bandleader, and music educator.  She is best known as the leader of the Latin and Brazilian jazz band Annette A. Aguilar & StringBeans, which has toured extensively in the United States and Africa.  Aguilar is a former percussionist with The Grateful Dead.  She is the founder of the annual Women in Latin Jazz Festival in New York, and is also a Latin Jazz Ambassador for the U.S. State Department.

Fitz Remedios Santana de Souza: Fitzval Remedios Santana Neville de Souza (born 1929, Mumbai), often known as Dr. F. R. S.N. de Souza and Fitz De Souza, is a Kenyan lawyer and ex-politician of Indian origin, who was an important figure in the campaign for independence for Kenya, a member of the Kenyan parliament in the 1960s and Deputy Speaker for several years.  He helped provide a legal defence for those accused of Mau Mau activities including the Kapenguria Six, and he was one of the people involved in the Lancaster House conferences held to draw up a constitutional framework for Kenyan independence.

Merlin D'Souza: Merlin D'Souza (Merlyn) is an Indian composer and pianist from Bombay.  She is a musician whose work includes composing for film, albums, theatre and advertising.  She is based at Bandra, a Mumbai suburb.  Formerly the Asian jazz ambassador for Hennessy X.O. – she has toured extensively, from Australia to China, from Europe to the United States (including a stint at the Blue Note, New York).

Uma gaita na bossa: Uma gaita na bossa, also known as Nos caminhos da bossa, is a 1997 album by the Brazilian harmonica player Clayber de Souza.  It is collection of the main hits of Bossa nova, Jazz and Blues, such as "Samba de uma nota só" and "Garota de Ipanema".  However, all its songs were arranged as a fusion of Samba and Jazz, remembering the period Souza played as bass guitarist, in 1960s.

Hennessy: Jas Hennessy & Co., or more simply Hennessy, is a cognac house with headquarters in Cognac, France.  Jas Hennessy & Co. sells about 50 million bottles a year worldwide, or more than 40 percent of the world’s cognac, making it the world's largest cognac producer.  It is owned by Moët Hennessy, which is in turn owned by LVMH (66%) and Diageo (34%).

Supporting paragraphs: Merlin D'Souza Hennessy
Answer: Cognac, France