Nobody has ever found the orange clay that piggy banks are named after

Both approaches to the origin of the piggy bank work. What differs is what they cost you, and the cost is what this sets out.

The story everyone repeats

The standard account holds that English potters once worked in an orange clay called pygg and made household jars from it for storing coins. A customer, so the story goes, asked a potter for a pygg jar and received a container in the shape of an animal, and the pun became an industry. It appears in encyclopaedias, museum labels, children's books and countless articles about the history of saving.

The story has everything a good etymology needs, including a misunderstanding, a craftsman and a moment of accidental invention. It also has the characteristic weakness of such stories, which is that the crucial word cannot be found anywhere.

The missing word

Historical dictionaries of English record a great many terms for clays, wares and potters' materials, and none of them is this one. The word appears in modern retellings and nowhere in the older record, which is precisely backwards for a genuine etymology.

If a material had a name common enough to cause a misunderstanding at a potter's counter, it would appear in trade documents and inventories. The absence is not proof of impossibility, but the burden sits with whoever wants to assert a word nobody can document. Etymologists have looked, repeatedly, and the entry remains empty.

What the record does show

The English term for the object is comparatively recent, appearing considerably later than the story would require if the pun had happened centuries earlier. Earthenware containers for coins are much older and appear across many cultures without any animal shape at all.

Pig-shaped money containers made of terracotta have been found in Southeast Asia, dating from a period long before the supposed English potter. That distribution is difficult to reconcile with an origin in a misheard order at an English pottery. It suggests instead that the pig is a symbol that has occurred to people independently in different places.

Why a pig

A pig is an animal that is fed steadily and then, at one moment, yields everything it has accumulated, which is an unusually neat metaphor for saving. Household pigs were also a form of stored wealth in agricultural societies, converting scraps into value that could be realised when needed.

The shape is practical for a container, offering a rounded body and short legs that make a stable object. A sealed pot that must be broken to be opened enforces saving in a way that a lidded jar does not, and the animal shape suits that.

None of this requires a pun, and all of it explains why the same idea appears in unconnected places.

How the clay story survives

It is repeated by institutions that people trust, which gives it a level of authority that a bare rumour would not achieve. Once a museum label carries it, later writers cite the museum rather than a dictionary, and the loop closes.

Somewhere in the retelling, the story is also charming and harmless, so nobody has any incentive to be the person who ruins it. Corrections have been published for many years in reference works and have made very little impression on general circulation. This is the standard fate of a correction that removes a story and offers uncertainty in its place.

Where the earliest trace is a newspaper anecdote, treat the whole chain with suspicion.

What to say instead

The honest version is that the origin of the shape is not established and that the clay story has no documentary support. The symbolism of the pig as accumulated household wealth is a reasonable explanation and does not depend on any wordplay.

Checked against the record, uncertainty is a perfectly good answer, and it is the answer that the evidence currently supports. It also leaves room for the genuinely interesting fact, which is that the same idea occurred to people in places with no contact. A convergent invention is a better story than a pun, and it has the advantage of being visible in the archaeology.

Side by side

The takeaway

The entire etymology depends on one word, and that word has never been found in any dictionary of English.

Ask who gained from the claim being repeated. That usually explains the rest.