Translation

suwan means "Swan" in English.
It's a katakanization, a loan-word.

suwan is normally written with katakana, as スワン.
suwan written with hiragana is すわん.
suwan does not have kanji.
Romaji su wa n
Katakana
Hiragana

Synonyms

Further Reading

Wikipedia: 白鳥 (Swan)