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Jyutping ji5 syun1
Pinyin ěr sūn

Definitions (Wiktionary)
  1. noun, literary
    great-great-great-great-great-grandson (in a male lineage)

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Jyutping ji5 syun1
Pinyin réng sūn

Definitions (Wiktionary)
  1. noun, literary
    great-great-great-great-great-grandson (in a male lineage)