Publius Valerius Cato (flourished 1st century BC) was a grammarian and poet of the Roman Republic.
They regarded knowledge of Greek literature and myths, and strict adherence to metrical rules, as indispensable to the poet.
During the latter part of his life he was in reduced circumstances, though at one time he had considerable wealth, and owned a villa at Tusculum which he was obliged to hand over to his creditors.
[1] In addition to grammatical treatises, Cato wrote a number of poems, the best-known of which were the Lydia and Diana.
It is probable that he is the Cato mentioned as a critic of Lucilius in the lines by an unknown author prefixed to the Satires of Horace.