Jordanus is the Latin form of Jordan and refers to: Jordanus of Bristol, a saint venerated in Bristol, England Jordanus or Jordan Catalani, a 14th-century French missionary and explorer Jordanus de Nemore (Renaissance version: Jordanus Nemorarius), a medieval mathematician Jordanus of Saxony, c. 1190–1237, 2nd Master General of the Order of Preachers (Dominicans) Raymundus Jordanus, a 14th-century Christian writer also known as Idiota It may also refer to: Jordanus (constellation), an obsolete constellation name