Robert Mills Delaney, sometimes incorrectly spelled Delany (1903-1956) was an American composer. He studied with Nadia Boulanger and Arthur Honegger in Paris, and was best known for his 1928 choral symphony, John Brown's Song, based on Stephen Benet's Pulitzer Prize winning poem "John Brown's Body".
Delaney's name is difficult for a lot of people to spell. 
It clearly states that his name is sometimes spelled incorrectly and for that to be included in the text means that it is a common mistake. I believe the ai go it wrong because of my wording. 