Yohannan
| Gender | Male | 
|---|---|
| Origin | |
| Word/name | Syriac | 
| Region of origin | Middle East | 
| Other names | |
| Related names | Yuhanna (Arabic), Youhannon (Malayalam), Yohanan (Hebrew), John | 
Yohannan (Classical Syriac: ܝܘܚܢܢ) is a Syriac name, from the Hebrew name Yohanan, equivalent to English John.
It may refer to:
- Yohannan the Leper, a.k.a. 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 (c. 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