a Roman jurist of uncertain time, who is often cited by Ulpian and Paulus. It appears that he referred to the authority of Sabinus, Cassius, and Proculus, and must therefore have been junior to them. (Dig. 29. tit. 7. s. 14.) Pomponius appears to have annotated Vivianus, and therefore wrote after him (Dig. 13. tit. 6. s. 17.4). Vivianus may accordingly have lived under Hadrian and Trajan