Koussevitzky's original Russian forename is usually transliterated into English as either Sergei or Sergey; however, he himself adopted the French spelling Serge, using it in his signature. (See The Koussevitzky Music Foundations official web site. Retrieved 2009-11-05.) His surname can be transliterated variously as Koussevitzky, Koussevitsky, Kussevitzky, Kusevitsky, or, into Polish, as Kusewicki; however, he himself chose to use Koussevitzky.