Amantius or Amancius may refer to several figures in Roman and early Christian history:

Saints Amantius (died 120), martyred with Saint Getulius Amantius of Como (died 448), bishop, succeeded by Abundius

Bishops (400–440), a bishop of Rodez Amantius, archbishop of Reims (3rd century) Amantius, the first bishop of Nice (4th century) Amantius, bishop of Sisteron (9th century) Amantius, bishop of Saint-Paul-Trois-Châteaux

Others , consul in 345 Amantius (praepositus), Byzantine grand chamberlain (died 571)

See also