Musician Mentors? Some had family members who taught them or exposed them to music. Others had fame in other fields. Many were self taught, see:
Some prominent families of classical musicians who have excelled in their field; i.e. son, father, mother, daughter, sister, or brother of a musician who achieved fame in music or another field. Ideas? Send contributions to musiclassical[no spam].com
Thanks to list members and contributions of Karen Johnson, Alan Campbell and Leora Zeitlin who's father is violinist Zvi Zeitlin. She adds that Rudolf Serkin was the son-in-law of the violinist Adolph Busch, who himself was from a musical family. Which is another side of musical family trees- fathers-in-law or sons-in-law of other composers, such as: Bizet (son-in-law of opera composer Fromental Halevy) Wagner (son-in-law -- though not legally -- of Liszt) Josef Suk (son-in-law of Dvorak).