中フランス語のpompon, pumpkinから、ラテン語のpeponem, melon, squashから、ギリシャ語のpeptein, to cook, to ripenから、PIE*pekw, to boil, to sautéから、語源的にはcook, peptide, dyspepticと同じ。比喩的用法。
America's a dandy place:
The people are all brothers:
And when one's got a punkin pye,
He shares it with the others.
[from "A Song for the Fourth of July, 1806," in "The Port Folio," Philadelphia, Aug. 30, 1806]