| Language(s) | Chinese (Mandarin, Hokkien), Korean, Old Irish |
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Gan is a surname. It may be a Latin-alphabet spelling of four different Chinese surnames (Chinese: 甘, 干, 顏, 簡; respectively pronounced in Mandarin as Gān, Gān, Yán, Jiǎn), a Korean surname (Korean: 간; Hanja: 簡; written using the same character as the Chinese surname Jiǎn), and a surname in other cultures.