The gens Didia, or Deidia, as the name was spelled on coins, was a plebeian family at Rome, which first appears during the latter period of the Republic. Cicero calls them novi homines. The only member of the family who obtained the consulship under the Republic was Titus Didius, in 98 BC.
The Didii used the praenomina Titus, Sextus, Gaius, Quintus, Aulus, and Lucius.
In the time of the Republic, no Didius bore a cognomen.
This article incorporates text from a publication now in the public domain: Smith, William, ed. (1870). "". Dictionary of Greek and Roman Biography and Mythology.