Abundius and Abundantius (died c. 304) are Christian martyrs who were killed during the Diocletian persecution.
Abundius was a priest who was claimed to have earlier resurrected John, the son of Marcianus.
Upon hearing of this, the emperor ordered these three, with Abundantius, a deacon, to be beheaded.
The bodies of Marcianus and John were found around 1001 and transferred to Civita Castellana.
Nome di Gesu, where they were placed under the church's high altar.