List of Famous people born on April 21st

Jaroslav Kvapil was a Czech composer, teacher, conductor and pianist.

Joseph Caldwell was a U.S. educator, Presbyterian minister, mathematician, and astronomer. He was the first president of the University of North Carolina at Chapel Hill, holding the office from 1804 until 1812, and from 1816 until his death in 1835.

Gong Deok-gwi was the wife of Yun Bo-seon, and thus was the second First Lady of South Korea from 1960 to 1962.

Julius Korir is a former Kenyan athlete, who won the 3.000 m steeplechase at the 1984 Summer Olympics.

Heinrich Limpricht was a German chemist. Limpricht was a pupil of Friedrich Wöhler; he worked on the chemistry of furans and pyrroles, discovering furan in 1870.

Gregory Brenes Obando is a Costa Rican cyclist who last rode for Inteja Imca–Ridea.

Lorenzo Tio Jr. (1893–1933) was a master clarinetist from New Orleans, as were his father Lorenzo Tio Sr. (1867–1908) and uncle Louis "Papa" Tio (1862–1922). Their method of playing the instrument was seminal in the development of the jazz solo.

Valerius Herberger was a German Lutheran preacher and theologian.