Original: Titus Aurelius Fulvus Boionius Arrius Antoninus (19 September 86 â "7 March 161), commonly known as Antoninus or Antoninus Pius, was Roman Emperor from 138 to 161.
Simplified: Antoninus Pius (Titus Aurelius Fulvus Boionius Arrius Antoninus, 19 September 86 â "7 March 161), or simply Antoninus, was Roman Emperor from 138 to 161.