ðə fˈɜːst wʌz pɹəpˈoʊzd baɪ zəsˈɪmoʊz ʌv pænˈɑːpəliz θˈɜːd fˈoːɹθ sˈɛntʃɚɹiz, hˌuː dᵻɹˈaɪvd ɪt fɹʌmðə nˈeɪm əvə bˈʊk, ðə kˈɛmjuː.
The first was proposed by Zosimos of Panopolis (3rd–4th centuries), who derived it from the name of a book, the Khemeu.