Yohannan () is a Syriac name, from the Hebrew name Yohanan, equivalent to English John. It may refer to: * Yohannan the Leper, Yohannan Garba ("the Leper"), originally metropolitan of Nisibis, was anti-patriarch of the Church of the East between 691 and 693 * Yohannan I, a.k.a. Yohannan I bar Marta, patriarch of the Church of the East between 680 and 683 * Yohannan II, a.k.a. Yohannan II bar Narsai, Patriarch of the Church of the East from 884 to 891 * Yohannan III, the nephew of the patriarch Theodosius (853–858), was Patriarch of the Church of the East from 893 to 899 * Yohannan IV, Patriarch of the Church of the East from 900 to 905 * Yohannan V, Patriarch of the Church of the East from 1000 to 1011 * Yohannan VI, a.k.a. Yohannan VI bar Nazuk, Patriarch of the Church of the East from 1012 to 1016 * Yohannan VII, a.k.a. Yohannan VII bar Targhal, Patriarch of the Church of the East from 1049 to 1057 * Yohannan VIII Hormizd, a.k.a. John Hormez or Hanna Hormizd, Patriarch of the Chaldean Catholic Church (d. 1830) * Yohannan, Metropolitan of India ( 1490–1504) * K. P. Yohannan (1950–2024), founder and president of Gospel for Asia; the Metropolitan of Believers Church * T. C. Yohannan (born 1947), Indian long jumper * Tim Yohannan (1945–1998), founder of ''Maximum Rocknroll'', a radio show and fanzine documenting punk subculture

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