noun
Haydn (surname)
Used as a family name; may also appear as a given name in some contexts.
ハイドンという名字の人はオーストリアに多い。
The surname Haydn is common in Austria.
noun
Joseph Haydn (1732-1809, Austrian composer)
Refers specifically to the composer Franz Joseph Haydn.
ハイドンの交響曲第94番は「驚愕」と呼ばれている。
Haydn's Symphony No. 94 is called the 'Surprise'.