John Edmund Paul Aldous (8 December 1853 – 23 January 1934) was a Canadian organist, conductor, composer, and music educator of English birth. His compositional output includes many short pieces for piano, organ, choir, and voice. He also composed four operettas: Ptarmigan or A Canadian Carnival (published 1895), A Golden Catch, Nancy or All for Love, and The Poster Girl (published 1902). Some of his more well known works are Prelude and Fugue for organ, the choral works Grant, We Beseech Thee, Merciful Lord and Blessed Are the Dead that Die in the Lord, and the hymn Egypt, all of which have been reprinted several times.