Indian Island in And Then There Were None is now Soldier Island.
https://www.theparisreview.org/blog/2016/02/05/mystery/
“Agatha Christie’s And Then There Were None,” is, of course, Agatha Christie’s Ten Little Indians—which was originally, notoriously, released serially in the UK under the title Ten Little Niggers. (This was the British music-hall version of the minstrel song.) Even in 1939, this title was considered too offensive for American publication.