Titus Quinctius Capitolinus Barbatus (consul 421 BC)

The year saw war against the Aequi and great military success for Quinctius's colleague Fabius, who celebrated an ovatio (minor triumph) for his victories.

[7][8][9][10] It is unclear if the consul of 421 and the consular tribune of 405 BC should be considered as the same individual or as father and son.

Broughton in Magistrates of the Roman Republic treats both posts as being held by the same individual while the large encyclopedia Dictionary of Greek and Roman Biography and Mythology treat them as two different individuals with the father holding the consulship and his son being the consular tribune.

Suolahti's main suggestions for these unknown censors are Spurius Nautius Rutilus and Manius Aemilius Mamercinus but adds Quinctius, among a few others, as one of the viable options.

While Suolahti argues for the existence of these unknown censors and lustrum XV, these possible candidates should be noted, and is noted by the author himself, are simply educated guesses based on the suitability of the candidates to the office and are in the authors words "mere suppositions".