Abdon and Sennen, variously written in early calendars and martyrologies Abdo, Abdus, and Sennes, Sennis, Zennen, are recognized by the Catholic Church and Eastern Orthodox Church as Christian martyrs, with a feast day on 30 July.

The Roman Martyrology indicates that they were martyred for their faith, and suggests they were buried on 30 July in the Cemetery of Pontianus on the Via Portuensis, outside Rome.

A fresco found on a sixth century sarcophagus supposed to contain their remains represents them receiving crowns from Christ.

Several cities, notably Florence and Soissons, claim possession of their bodies, but the Acta Sanctorum insist that they rest in the Basilica of San Marco Evangelista al Campidoglio, Rome, having been brought there in 1474.

The feasts days celebrated in their honor in this Spanish town date back to the 16th century.