To know Hazel’s names is to see the tree from many angles at once: as plant, as craft material, as mythic figure, as companion species and as symbol.

Hazel is one of those plants whose names feel older than language itself; short, round, nut‑shaped words that seem to have rolled through centuries without losing their shine. This Note gathers the names Hazel has carried: botanical, regional, folkloric, and mythic. It is the quiet companion to the larger Hazel story, the place where the tree’s identity is spelled out with care.

Botanical Name & Etymology

The genus name Corylus comes from the Greek korys, meaning helmet, a reference to the hard, protective husk that fits over the nut like a small cap. It is one of those rare botanical names that feels perfectly literal: Hazel is the tree whose fruit wears armor. The ancient writers noticed this immediately, and the name has remained stable across Latin, medieval herbals, and modern botany.

The species most familiar in European and North American lore is Corylus avellana, the common Hazel. The species epithet avellana refers to the Italian town of Avella, famed in antiquity for its nuts. The Romans called them nux avellana, the nut from Avella, and the name stuck so firmly that it still clings to the species today.

Hazel’s botanical names, then, are a small story in themselves: a helmeted nut from a town known for nuts; a tree defined by its fruit.

Species & Their Characters

Hazel is not a single tree but a small, coherent family. The species differ in temperament, some are woodland makers, some hedgerow builders, some orchard specialists, but they share the same essential grammar: catkins in late winter, round nuts in autumn, pliant stems, and a fondness for edges and light.

Corylus avellana is the European Hazel, the species of Celtic myth, medieval craft, and British hedgerows. It grows as a many‑stemmed shrub, coppices readily, and forms the ecological backbone of Hazel woodland.

Corylus americana, the American Hazel, is its New World cousin and is shorter and more thicket‑forming, with nuts enclosed in a ragged, leafy husk. It plays the same ecological role in North America that C. avellana plays in Europe: early pollen, dense cover, food for red companions.

Corylus maxima, the filbert, is the orchard species. Its nuts are longer, its husks more elaborate, and its cultivation history deep. Many commercial hazelnuts are hybrids of avellana and maxima, bred for yield, shell thickness, and flavor.

There are others: Turkish Hazel (Corylus colurna), a tall, single‑stemmed tree; beaked Hazels with their long, pointed husks—but the Hazel of lore, craft, and story is almost always C. avellana or its close kin.

Common Names & Regional Variants

Hazel’s common names are a map of Europe in miniature. Each region names the tree for what it values most: the nut, the wood, the season, the saint.

Hazel itself is ancient, likely from Old English hæsl, related to words for “light brown” and “reddish‑gold” after the color of the nuts, the catkins and the wood in winter sun.

Filbert is the old English and French name, tied to St. Philibert’s Day in late August, when the nuts begin to ripen. A filbert is a Hazel nut at the moment of feast and harvest.

Cobnut is the Kentish name, still used for cultivated varieties sold fresh in their husks. A cob is a round, sturdy nut, shorter than a filbert, closer to the wild form.

Kentish cob, Lambert filbert, Barcelona, Tonda di Giffoni: the orchard names multiply, each tied to a region, a flavor, a shell shape. Hazel is one of the few trees whose fruit has a full vocabulary of its own.

Across Europe, the names shift but the meaning stays close: the nut, the husk, the color, the feast.

Hazel in Language & Folklore

Hazel’s names often blur into metaphor. In medieval English, hazel‑eyed meant a shifting, changeable color: green, gold, brown, all at once. In Irish and Scottish lore, Hazel is the tree of wisdom, so its name appears in poems and place‑names as a marker of insight, inspiration, or poetic authority.

The Irish word for Hazel, coll, is one of the Ogham letters: the ninth, associated with creativity, knowledge, and poetic skill. The Welsh cyll and the Breton koll share the same root. These are not just names; they are cultural signals.

In many languages, the word for Hazel is also the word for wand or rod, because Hazel wood was the preferred material for divining rods, love charms, and truth‑tests. The name of the tree becomes the name of the tool.

Hazel’s linguistic life is long, stable, and strangely coherent. Across centuries and languages, the names always return to the same themes: nut, wisdom, color, craft, feast, rod.

Historical Spellings & Oddments

Medieval herbals record Hazel as hasel, haysel, hassell, hasele, and hasylle. The spellings vary, but the sound remains the same; soft, round, nut‑shaped.

In some regions, the nut itself was simply called a nux, a “nut,” without further distinction. In others, the Hazel was the default nut, and all others required qualifiers.

Hazel’s names are small, sturdy and persistent. They travel well. They survive translation and carry the tree’s character intact.

Why Names Matter

Hazel is a tree of thresholds: between winter and spring, between worlds, between knowledge and inspiration. Its names reflect that liminal nature. Botanical names give it armor and geography; common names give it feast days and color; folklore names give it wisdom and authority.