智秀 is the standard Mandarin transcription of the Korean name 지수 (Ji-soo / Jisoo). The most prominent bearer in Chinese-language media is Kim Jisoo (金智秀), vocalist of the K-pop group BLACKPINK and an actress.
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The characters were chosen to fit the Korean Hanja: 智 'wisdom' + 秀 'elegant/outstanding' — a flattering name meaning roughly 'wise and outstanding'.