Iūpiter — the one true spelling, and the forms that fail it

Evidence dossier 241 — Iūpiter. Every exhibit catalogued, every ruling stated with its grounds.

At a Glance

• Canonical form: Iūpiter
• Original script: IVPPITER
• Pantheon: Roman
• Convention: Latin editorial convention, with Greek originals kept distinct from Roman reception
• False forms on record: 2
• Contested forms: none attested
• Series: The Canonical Register, No. 241 of 546

The Evidence

Exhibit 1 — the attestation. The attested form is IVPPITER, from the tradition's own record. The canonical transliteration is Iūpiter.

Exhibit 2 — the preserved marks. u → ū (Macron: long /uː/ (Iūpiter)). Each is verifiable against the sources named in the attestation.

Exhibit 3 — the flattened form. The plain form iuppiter is not false — it is a fallback, and the register is exact about what that means. In systems that cannot carry diacritics (legacy databases, older tooling, parts of the address-bar pipeline) the flattened form is the accepted vehicle, and the rulebook names it explicitly as the final rung of the fallback hierarchy: full restoration first, circumflex where attested, macron-only by the academic standard, an attested variant, and only then plain ASCII.

What the fallback status forbids is promotion: iuppiter may carry the name where marks are impossible, but it may not represent the name where marks are possible. Every mark it drops — u → ū — is a fact the sources recorded. A fallback is a vehicle, never the primary.

Exhibit 4 — struck from the record: Iupiter. Origin: the publisher compromise — older books and hurried websites that print the "English equivalent" as if it were the name itself. Grounds: every substitution here (ū→u) is a romanization of convenience, not an attested spelling — it teaches the reader to guess, not to read.

Exhibit 5 — struck from the record: Iúpiter. Origin: the near-miss — a form that looks right at a glance and circulates on wikis and forums. Grounds: a macron marks length; an acute marks tone — different facts.

Exhibit 6 — the physical record. The Capitoline temple of Iuppiter Optimus Maximus — vowed in the first year of the Republic and dedicated in 509 BCE, burned and rebuilt again and again — survives most concretely in its massive tuff podium beneath the Palazzo Caffarelli on the Capitol and in the triple-cella plan described by Pliny and Dionysius of Halicarnassus. The Jupiter-columns of the German provinces, topped by the god on horseback trampling giants, survive in reconstructions at Mainz and Stuttgart. Legions of his aquilae fill the museums of two continents, and votive hands, thunderbolt-wreaths, and Dolichenus altars from the frontier forts trace the god's provincial career in bronze and stone.

Exhibit 7 — the continuing record. 'By Jove' keeps the oath in English, and Plautus' characters were already crying pro Iuppiter on the Roman stage. Dies Iovis gives English Thursday, French jeudi, Italian giovedì; his planetary temperament survives in 'jovial.

The Convention's Own History

Every tradition in this register has its own scholarly transliteration standard, built by its own specialists over decades or centuries, and the register follows each on its own terms: Latin editorial convention, with Greek originals kept distinct from Roman reception. The principle that unifies them is the one the whole project stands on: a name is evidence, and evidence is not negotiable — not for keyboards, not for convenience, not for anyone.

The Protocol's Position

Can the canonical form live in the address bar? Almost always, yes. IDNA 2008 admits every mark this register defends — the DNS stores them as `xn--` punycode and modern browsers render them natively. The real frictions are practical, not legal: some registrars stock only part of the IDN space, so a theoretically valid name can be temporarily unbuyable; and stacked combinations (an acute riding a macron) remain awkward to type on mobile keyboards even where the protocol accepts them.

The project's answer is a ranked ladder, not a compromise: the full restoration first, then attested fallbacks in descending order of completeness. The ladder's lowest rung, plain ASCII, is a vehicle for legacy systems — sanctioned, but never presented as the scholarly form.

The Verdict

Case closed on Iūpiter: canonical, cited, and defended. The keyboard form iuppiter rides as the sanctioned fallback — and stays in that lane. The register's files remain open: if a source surfaces that changes any line of this entry, the entry changes. Until then, the temple at /iuppiter/ holds the canonical form.

The docket for this ruling: 2 false forms ruled against, Iupiter first on the docket; 1 preserved mark verified: u → ū; no contested forms attested; the attestation rests on 6 cited sources — Livy 1.24 (the fetial oath), 1.10 (Romulus and Acron), 4.19–20 (Cossus), Pliny, Natural History 33.111 (the triumphator's painted face), Tertullian, Apologeticum 33.4 (the whispering slave).

The Register Continues

Entry 241 of 546 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: Iūnō (read it) · next entry: Izanagi (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.