Yeou-Cheng Ma, Sister of Yo-Yo, Continues A Legacy – New York Times

In 1962, Leonard Bernstein, presiding over a fund-raiser in Washington called American Pageant for the Arts, introduced a 7-year-old cellist named Yo-Yo Ma. Among the honored guests were President John F. Kennedy — Jacqueline, too — and Dwight D. Eisenhower.
Yo-Yo, who had arrived to the United States from Paris a year earlier with his family, Bernstein said, would now perform the first movement of a concertino by Jean-Baptiste Bréval, accompanied at the piano by his 11-year-old sister, Yeou-Cheng Ma — who, Bernstein added, was “pursuing her musical studies.”
Their performance, which was televised (and can be seen below), was remarkable.