Realm and plane names: cosmologies, otherworlds and ideas

Most made-up realm names fail in one of two ways. They either borrow a single grand word and stop there, so the whole afterlife is just called the Beyond, or they pile on so many apostrophes and silent letters that the name reads like a password rather than a place. The sweet spot is a name built like the great otherworlds of myth: a resonant stem, often part real root and part invented, joined to a suffix that suggests scale and shape, then framed by a form that tells you what kind of realm it is. Get that and your plane sounds like somewhere a god might live and a hero might die.

Realms are not kingdoms

It is worth drawing a line early, because the two get muddled. A kingdom is a political state, a thing with borders and a ruler and an army, the sort of place named in the kingdom name generator. A realm, in the cosmic sense this guide means, is an otherworld: a plane of existence that sits alongside or beyond the mortal world, reached through a portal, a ritual or a final breath. The celestial heavens, the infernal pits, the elemental planes, the shadow lands and the dreaming are realms, not realms you can ride to. Naming them wants a grander, stranger register than naming a country, which is why this tool keeps its own set of kinds and forms.

A stem, a suffix and a form

Mythic realm names tend to be a stem plus a suffix that hints at scale or shape: a reach is a vast expanse, a void a yawning emptiness, a vale a sheltered land, a deep a place far down and far in. Take a stem like Aurel or Gloam or Pyre, add a suffix like reach, wend or spire, and you have Aurelreach, Gloamwend, Pyrespire: names that feel like somewhere the laws of the world bend. The third layer is the form, the framing that says what kind of realm it is. The same stem becomes the Plane of Aurel, the Realm of Aurel or the Void of Aurel depending on whether you mean a cosmic sphere, a bounded land or an abyss.

Pick a kind for the flavour

Planes differ by what they are made of, and choosing a kind keeps a name coherent. Five flavours cover most cosmologies:

• Celestial. Radiant upper planes of light and song: the Plane of Aurelane, the Realm of Empyrea.
• Infernal. Burning lower planes of fire and torment: the Void of Malebrand, the Pit of Gehenmoor.
• Elemental. Raw planes of fire, water, air and stone: the Plane of Pyrelis, the Reach of Tempest.
• Shadow. Grey twilight planes of dusk and silence: the Realm of Gloamwend, the Shadowfen Reach.
• Dream. Shifting planes of sleep and vision: the Plane of Somnareth, the Dreaming of Lethe.

If you want to hear a stretch of names in any of these styles, the realm name generator builds them by kind, lets you choose the realm form, and lets you save and refine the ones you like.

The form does the scale

The form you wrap a name in tells the reader, in a single phrase, what sort of otherworld this is. A Plane is a cosmic sphere, one of the great pillars a setting is built on, somewhere whole pantheons live. A Realm is bounded and ruled, a land within the planes with its own lord and law, the sort of place a campaign can actually visit. A Void is a yawning abyss, a place defined by what it lacks, where things fall and do not return. And a Reach is a far waste at the edge of the map of the worlds, half-charted and dangerous. Switching only the form while keeping the stem is a quick way to sketch a whole cosmology around one root: the Plane of Aurel holds the Realm of Aurel at its heart, and the Void of Aurel gapes somewhere below.

Building a cosmology, not just a plane

If you are mapping a whole set of planes rather than naming one, keep the kinds varied so the heavens do not sound like the hells, and lean on the suffixes to suggest each realm's nature: spire and vale and gard for ordered celestial lands, rift and pit and void for the infernal deeps, wend and loom and fen for the shadow places. A cosmology where every plane ends in the same suffix reads as one author's notebook rather than a living set of worlds. The generator gives each name a planar suffix you can swap, so it is easy to build a wheel of planes that feels coherent without being repetitive.

Using the generator well

Treat the tool as a cosmology machine. Choose a kind, set the realm form, and generate a batch. Read them aloud and keep the two or three that sound like somewhere a soul might end up. If a stem is perfect but the form is wrong, use Refine to keep the realm name and reroll the framing, or turn off the realm title for the bare name and add your own. For more on shaping a name once you have a candidate, see the broader guide on how to name a fantasy character, which applies to places as much as people.

A few pitfalls

• Unpronounceable stems. If a player cannot say your plane, they will not invoke it at the table. Keep stems sayable in one go, even when they are strange.
• Confusing realms with kingdoms. If the place has borders, a ruler and a tax collector, it is a kingdom, so name it as one. Save the realm generator for the worlds beyond the world.
• Every plane the same shape. A cosmology where every realm is the Plane of Something gets flat. Vary the forms so planes, voids and reaches sit side by side.

Once your planes have names, the beings that rule them want names too. The demon and dragon generators name the powers of the lower and elder planes, while the mortal world below wants its own kingdoms and cities.