nullius filius

noun

"nullius-filius" is a 13-letter English headword indexed on PlainSpell.

The verdict

“nullius filius” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
14
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A child of unknown parentage; an orphan.

Corpus desk

Index EN-nullius-filius · nullius filius · English

nullius filius · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 14 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "N" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for nullius filius
PropertyValue
Headwordnullius filius
LanguageEnglish
Part of speechNoun
Letters14
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “nullius filius” in English

nullius filiusfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

nullius filius is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.

nullius filius doesn't appear in our generated misspelling index, which points to an orthography that plays by predictable English rules. This headword has no recorded confusable partner, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: Borrowed from Medieval Latin nullius filius (“nobody's son”), from Latin nullius + filius. The correct English form is nullius filius, spelled N-U-L-L-I-U-S- -F-I-L-I-U-S.

Definition

  1. 1
    A child of unknown parentage; an orphan.
  2. 2
    The son of no one; a bastard.

Recorded use

Wiktionary example

These source excerpts show how nullius filius appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. A bastard is considered nullius filius as far as regards his right inherit. But the rule of nullius filius does not apply in other respects

Etymology

Borrowed from Medieval Latin nullius filius (“nobody's son”), from Latin nullius + filius.

Synonyms

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "nullius filius"?
"nullius filius" is spelled N-U-L-L-I-U-S- -F-I-L-I-U-S.
What does "nullius filius" mean?
As a noun, "nullius filius" means: A child of unknown parentage; an orphan.
What is the origin of the word "nullius filius"?
Borrowed from Medieval Latin nullius filius (“nobody's son”), from Latin nullius + filius. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list