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Jyutping gwan1
Pinyin jūn

Definitions (Wiktionary)
  1. name
    Jun prefecture

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Jyutping wan4
Pinyin yún

Definitions (CC-CANTO)
  1. skin of bamboo/bamboo
Definitions (Unihan)
  1. bamboo skin
  2. bamboo
  3. Cangjie Input
    HGPM

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Jyutping gwan1
Pinyin yún

Definitions (CC-CEDICT)
  1. skin of bamboo
Definitions (CC-CANTO)
  1. used in place names
Definitions (粵典–words.hk)
  1. 語素
    用​於​人名
    used in names
Definitions (Wiktionary)
  1. noun
    smooth hard skin of bamboo