Abundantius may refer to
Abundantius (consul), the Roman consul in 393 Abundantius of Putignano, Christian saint. died as a martyr. His relics are venerated at Putignano. His feast day is celebrated on March 22. Abundantius of Fiesole, Christian saint, was a deacon and martyr - see Abundius and Abundantius. Abundantius of Ossuna, Christian saint, became a martyr with Leo and Donatus.
See also Saint Abundantia (died 804), Christian saint Abundius (disambiguation), the name of several Christian saints