Mozart's sister, Maria Anna Mozart, called Nannerl, was born on July 30, 1751 in Salzburg. Nannerl, like Mozart, was considered a musical wonder-child and toured with her brother for several years. Her musical gifts, however, were overshadowed by the achievements of her younger brother.
The term "Mozart's ear" describes a deformity of the pinna where the two crura of the antihelix and the crus of the helix are fused. Researchers believe Mozart and his son, Franz, both suffered from this congenital defect.