Publius Cornelius Cossus was a consular tribune in 408 BC of the Roman Republic.
Cornelius father was the Roman hero Aulus Cornelius Cossus who had killed the King of the Veii, Lars Tolumnius, in single combat.
Following filiations it would seem that Gnaeus Cornelius Cossus, consular tribune in 406, and Publius Cornelius Cossus, consular tribune in 395 BC, were the sons of Cornelius or his namesake, Publius Cornelius Cossus, consular tribune in 415 BC.
[2] Cornelius held the imperium in 408 BC as one of three consular tribunes.
Cornelius' colleague Servilius moved against his colleagues and appointed a dictator, Publius Cornelius Rutilus Cossus.