Gaius (floruit AD 130–180) was a celebrated Roman jurist. Scholars know very little of his personal life. It is impossible to discover even his full name, Gaius or Caius being merely his personal name (praenomen). As with his name it is difficult to ascertain the span of his life, but it is safe to assume he lived from AD 110 to at least AD 179, since he wrote on legislation passed within that time.