Johar Ali Khan is a Classical Indian violinist.
 He is the son and disciple of the Late Ustad Gohar Ali Khan of Rampur, one of the greatest violin genius.
 He belongs to the Patiala Gharana of Rampur.
 He is the only living classical violinist from Patiala Gharana after his father - late Ustatd Gohar Ali Khan.
 His grandfather was Ustad Ali Baksh, the founder of Patiala Gharana, who has produced a number of great musicians like Bade Fateh Ali Khan, Amanat Ali Khan, Asad Amanat Ali Khan, and Hamid Ali Khan.
Pandit Biswajit Roy Chowdhury was born in 1956, in Deogarh, Chowdhury was initiated into music by his father Shri Ranajit Roy Chowdhary, who was teacher of chemistry by profession but, more importantly, a serious Sarod player trained under the Late Ustad Hafiz Ali Khan and others.
 In 1978, Roy Chowdhury's talents were spotted by the Maestro Ustad Amjad Ali Khan accepting him as a disciple.
 A turning point came when Pandit Mallikarjun Mansur took an interest in young Roy Chowdhury's quest in 1982.
 The union of an instrument player with Pandit Mansur set the journey on the path of fulfilling this quest.
 Biswajit Roy Chowdhary’s tutelage with Pandit Mallikarjun Mansur was formalized in a gandhabandhan ceremony in 1985 and the intensive guidance and training lasted till the demise of the guru in 1992.
 He is perhaps the only Sarod player who plays the coveted compositions from the Jaipur-Atrauli tradition.
Amjad Ali Khan is an Indian classical singer and teacher of Kirana Gharana.
 He descends from the family lineage of Ustad Abdul Wahid Khan and Ustad Abdul Karim Khan, who are deemed as the founders of Kirana Gharana.
 He got education in music from his father Ustad Akhtar Nawaz Khan, and his maternal uncles Ustad Mashkoor Ali Khan and Ustad Mubarak Ali Khan, the primary masters of Kirana Gharana musical style.
Muhammad Ali Khan Wallajah, or Muhammad Ali Khan Walla Jah (7 July 1717 – 13 October 1795), was the Nawab of Arcot in India and an ally of the British East India Company.
 Muhammad Ali Khan Wallajah was born to Anwaruddin Muhammed Khan, by his second wife, "Fakhr un-nisa Begum Sahiba", was a niece of Sayyid Ali Khan Safavi ul-Mosawi of Persia, sometime Naib suba of Trichonopoly, on 7 July 1717 at Delhi.
 Muhammed Ali Khan Wallajah the Nawab of Arcot often referred to himself as the Subedar of the Carnatic in his letters and correspondence with the then Mughal Emperor Shah Alam II.
Ayaan Ali Khan (Hindi: अयान अली ख़ान ; Urdu: ‎ ; IAST: Ayān Alī Khān ) (born 5 September 1979) is an Indian classical musician who plays the "sarod".
 Khan is the son of Amjad Ali Khan and often performs with his older brother Amaan Ali Khan, with whom he hosted the music talent show "Sa Re Ga Ma".
 He has also released solo albums and collaborations with brother and father.
Amjad Ali Khan (IAST: Amjad Ali Khan , Devanagari: अमजद अली ख़ान) (born 9 October 1945) is an Indian classical musician who plays the "Sarod".
 Khan was born into a musical family and has performed internationally since the 1960s.
 He was awarded India's second highest civilian honor Padma Vibhushan in 2001.
Fateh Ali Khan (Urdu: فتح علی خان) was a classical singer and a Qawwali musician in the 1940s and 1950s.
 He was born in Jalandhar, Punjab, British India in 1901.
 Fateh Ali Khan was the father of Pakistani Qawwali musicians, Nusrat Fateh Ali Khan and Farrukh Fateh Ali Khan.
 Their family has an unbroken tradition of Qawwali, linked closely to the Sufi Chishti Order for over 600 years.
 Fateh Ali Khan was trained in classical music and Qawwali by his father, "Maula Baksh Khan", and he, soon after his training, distinguished himself as a skilled vocalist and instrumentalist.
 He learned to play traditional Indian instruments such as sitar, sarod and vichitraveena as well as Western instruments like the violin.
 He also mastered thousands of verses in Punjabi, Urdu, Arabic and Persian.
Farrukh Fateh Ali Khan (Urdu: ‎ ) (December 25, 1952 – September 9, 2003) was a player of the harmonium in Qawwali and also was a member of a well-known family of Qawwali musicians.
 He was the younger brother of Nusrat Fateh Ali Khan, the son of Fateh Ali Khan, the nephew of Mubarak Ali Khan, and the father of Rahat Fateh Ali Khan.
Gurdev Singh (born 15 January 1948) is an Indian-born musician based in London who plays the plucked string instrument "sarod".
 Singh studied under "sarod" player Amjad Ali Khan, can play the instrument "dilruba", and sings Hindustani classical music.
 He performed on the 1993 album "Fate of Nations" by English rock singer Robert Plant.
 Singh has played internationally and taught students in England.
Amaan Ali Khan (Hindi: अमान अली ख़ान ; Urdu: ‎ ; IAST: Amān Alī Khān ) (born 1977) is an Indian classical musician who plays the sarod.
 Khan is the son of Amjad Ali Khan and often performs with his younger brother Ayaan Ali Khan, with whom he hosted the music talent show "Sa Re Ga Ma".

Question: What musical instrument does Amaan Ali Khan and  Amjad Ali Khan both play?
Answer: the sarod