This letter is a rude outline of a man's mouth, the upright being the neck. In Hebrew it is called pe (the mouth).
The five P's. William Oxberry was so called, because he was Printer, Poet, Publisher, Publican, and Player. (1784-1824.)
[alliterative]. In 1548, Placentius, a Dominican monk, wrote a poem of 253 hexameter verses (called Pugna Porcorum), every word of which begins with the letter p. It opens thus:
“Praise Paul's prize pig's prolific progeny.”
In English heroics the letter A or T would be far more easy, as they would give us articles.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894