The canonical register: Surtr
A letter to a colleague, 31 July 2026 — on the name Surtr, and on the forms that keep failing it.
Your note said, roughly: surely the marks are a nicety. Permit me to use Surtr to show they are not.
First, the attestation. The attested form is ᛋᚢᚱᛏᚱ, from the tradition's own record. The canonical transliteration is Surtr.
Say it aloud as the sources heard it: “SOOR-tr” — trilled r, both syllables short The marks are what carry that sound to a reader who has never heard it spoken.
On the plain form — and I want to be precise, because you pushed on this. The plain form surtr differs from the canonical Surtr only by convention of display — case, not content. It is acceptable everywhere: in legacy systems, in plain-text citation, in the DNS itself. What is not acceptable is what follows in the register: respellings that change the letters, not just their case.
One more thing, because it always surprises: the name did not stay home. Surtr is the Norse eschaton’s Persian fire: comparatists long ago paired him with the Zoroastrian world-fire and the volcanic destroyers of other traditions; and his role — the outsider-god of flame who ends and purifies — reads like a structural cousin of the Vedic Agni pushed to the world’s edge. Wagner’s Loge and Tolkien’s surtur-imagery carried him into modern fantasy as the type of the world-ending fire.
And it never stopped working. The Völuspá’s ‘sun of the battle-gods’ image remains Norse mythology’s most quoted line of doom; and Surtr is the fantasy genre’s template for the fire-giant — from D&D’s fire giants to video games, his name is the standard label for volcanic end-bosses. Iceland’s volcanic place-names (Surtshellir, the ‘cave of Surtr’) keep him in the landscape itself.
The Convention's Own History
The Poetic Edda survives essentially in one manuscript — the Codex Regius, c. 1270 — and normalized Old Norse spelling descends from what that manuscript and its siblings actually write. Þ and ð are not decorations: they are letters of the alphabet the skalds used (and English later abandoned), and ǫ is a nasal vowel the normalization preserves because the sources carry it. The register's rule is the manuscript's rule: spell the names the way the tradition that sang them wrote them down.
Where Protocol Meets Practice
The technical answer is simple: the canonical marks are legal IDNA 2008 characters, encoded as punycode under `xn--`. The practical answer is messier: legal does not mean stocked (registrar inventory is partial), and stocked does not mean typeable (stacked diacritics defeat mobile keyboards).
So the register's rule is a hierarchy of attested forms — full restoration, circumflex, macron-only, attested variant, and finally plain ASCII for the systems that cannot carry marks. Every rung is defensible because every rung is attested. The forms this register rules against are not rungs; they are errors, and errors do not get rungs.
Write back when you have checked the sources; they are better company than I am.
— The Register
The Verdict
Surtr is the canonical form: attested, checkable, and enforced across the temple, the lexicon, the cards, the APIs, and this register. The plain form surtr shares that standing — the two are the same name in every system. The false forms above are documented so that no reader has to take the temple's word on faith — the violations are stated, the sources are named, and the register stands open to challenge on every line.
The temple of Surtr stands at /surtr/.
The docket for this ruling: no false forms on the docket; no contested forms attested; the attestation rests on 4 cited sources — Völuspá (the Ragnarök stanzas), Vafþrúðnismál (the doom-arithmetic), Snorri, Gylfaginning (Múspellsheimr and the sons of Múspell).
The Register Continues
Entry 504 of 597 in the Canonical Register. Around it: the temple's founding dispatch, the Restoration File on the marks themselves, the Resonance File on the archetype at work, and the Rulebook behind all of it.
Continue the register — previous entry: Supay (read it) · next entry: Sūrya (read it).
The Canonical Register is written from the same canonical record as the lexicon itself. If a false form is missing from this page, it is because the evidence does not support calling it false — or because we have not seen it yet. Show us, with a citation, and the register will answer.