Alan Perlis

American computer scientist (1922–1990).

Born April 1st, 1922 in Pittsburgh.

Died February 7th, 1990 at 67 years old in Yale – New Haven Hospital (myocardial infarction).

Michael Karoli

German musician (1948-2001).

Born April 29th, 1948 in Essen.

Died November 17th, 2001 at 53 years old in Essen (cancer).

Lee Tracy

American actor (1898-1968).

Born April 14th, 1898 in Atlanta.

Died October 18th, 1968 at 70 years old in Santa Monica (liver cancer).

Sondra Radvanovsky

American-canadian opera singer.

Born April 11th, 1969 (age 57 years) in Berwyn.

Choi Jung-won

South korean actress.

Born April 24th, 1981 (age 45 years) in Busan.

Abubakar Malami

Nigerian jurist.

Born April 17th, 1967 (age 59 years) in Birnin Kebbi.

Brenda Ann Spencer

School shooter in san diego, california (usa).

Born April 3rd, 1962 (age 64 years) in San Diego.

John Gosden

British horse trainer.

Born March 30th, 1951 (age 75 years) in Hove.

George Vernon Hudson

English-born new zealand entomologist and astronomer (1867–1946).

Born April 20th, 1867 in London. ^[ref]

Died April 5th, 1946 at 78 years old in Karori. ^[ref]

Bob Boozer

American basketball player (1937-2012).

Born April 26th, 1937 in Omaha.

Died May 19th, 2012 at 75 years old in Omaha (intracranial aneurysm).