Shop windows and search results treat “family crest” as if it were the whole picture: shield, helmet, motto, and all. The officers who keep the official records do not. The College of Arms, the English heralds’ office, calls that use a popular misconception. A crest, they write, is a specific part of a full achievement of arms: the three-dimensional object placed on top of the helm.
The Court of the Lord Lyon in Scotland says the same thing in other words. The crest is the symbol on top of the helmet. The shield holds the main part of the arms. Using “crest” as a casual name for the whole design is common. It is not correct.
When the shield is shown with its surrounding parts, students of heraldry call the whole display an achievement. The Rare Books department at the University of Notre Dame walks through a complete example: shield, supporters, crown or coronet where one is due, helmet, mantling, and crest. The crest sits on a torse — a twisted wreath in the principal metal and colour of the shield — unless a coronet or other special base is used.
The College of Arms is also clear that the shield is the only compulsory piece. A crest, motto, and supporters may be granted with it, or used beside it, but they are not the arms themselves. That is why a printer can show a crest alone on a ring or a letterhead and still be showing only a fragment.
The other error travels with the first. The College of Arms states, on its public page, that coats of arms belong to specific individuals and families, and that there is no such thing as a coat of arms for a family name. From the twelfth century onward, arms have been borne by persons and by corporate bodies as marks of identification — not as a free picture that anyone named Smith or Campbell may copy.
Lyon’s frequently asked questions are even sharper for Scottish readers. There is no “family coat of arms” in Scotland in the souvenir-shop sense. A personal coat can be borne by one person at a time. A clan does not have a coat of arms. The chief has personal arms. A clan member may, by custom, wear a crest badge — the chief’s crest inside a belt and buckle — which is not the same as using the chief’s shield.
Internet pages that sell “the Williams arms” or “the Murphy crest” usually reprint a design that belongs, if it belongs to anyone, to one recorded person. Lyon says most of that information is inauthentic, and that what is sold is often the chief’s design. Buying it on a mug does not make it yours.
If you want the older language behind these distinctions, the next note in this series is How to read a coat of arms.