The following is a list of notable deaths in April 2021. Entries for each day are listed alphabetically by surname. A typical entry lists information in the following sequence: Name, age, country of citizenship at birth, subsequent country of citizenship (if applicable), reason for notability, cause of death (if known), and reference. == April 2021 == === 1 === Lee Aaker, 77, American actor (The Adventures of Rin Tin Tin, Hondo, Mister Scoutmaster), stroke. Isamu Akasaki, 92, Japanese physi…