Rachmaninov or Rachmaninoff?

[viking]

It had to be done.
SAM

[messiah]

Does it matter how it spells?

[Waldszenen]

Rachmaninoff

And on the same topic, do you people write "Prokofiev" or "Prokofieff"?

[prometheus]

Cyrillic spelling: Сергей Васильевич Рахманинов
Scientific spelling: Sergej Vasil'evič Rahmaninov
Romanized spelling he himself used: Sergei Rachmaninoff

Sergei  Rachmaninoff
Serguéi Rachmáninov
Sergej Rachmaninov
Sergueï Rachmaninov
סרגיי רחמנינוב
Sergei Rachmaninow
Siergiej Rachmaninow
Sergei Rahmaninov
Sergej Rahmaninov
セルゲイ・ラフマニノフ
serugei rafumaninofu


Cyrillic spelling: Серге́й Серге́евич Проко́фьев
Scientific spelling: Sergej Sergeevič Prokof'ev

Sergej Prokofjev
Serguéi Prokófiev
סרגיי פרוקופייב
Sergei Prokofjew
Sergiusz Prokofiew
Sergej PROKOFJEV
Sergueï Prokofiev
セルゲイ・プロコフィエフ
serugei purokofuiefu


Won't it ever stop?