cognomen

/kɒɡˈnoʊ.mən/

//kɒɡˈnoʊ.mən// noun

"cognomen" is a 8-letter English headword indexed on PlainSpell.

The verdict

“cognomen” is outside the top-ranked English vocabulary, used as a noun - the kind of word writers most often double-check.

Unranked
below top-frequency English
8
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A personal epithet or clan name added to the given name and family name of Ancient Romans.

Key facts for cognomen
PropertyValue
Headwordcognomen
LanguageEnglish
Part of speechNoun
IPA/kɒɡˈnoʊ.mən/
Letters8
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “cognomen” sits in English frequency

cognomen falls 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.

Spelling & Dictionary Insight

The English entry for cognomen is 8 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /kɒɡˈnoʊ.mən/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.

No generated misspelling entries exist for cognomen in our index, a straightforward case of a spelling with little room for common typos. This headword has no recorded confusable partner, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From Latin cognōmen, from con- (“with”) + nōmen (“name; family name”). The correct English form is cognomen, spelled C-O-G-N-O-M-E-N.

Definition

  1. 1
    A personal epithet or clan name added to the given name and family name of Ancient Romans.
  2. 2
    Synonym of nickname, any epithet used similar to the Roman cognomina.
  3. 3
    Synonym of surname, a family name.

Etymology

From Latin cognōmen, from con- (“with”) + nōmen (“name; family name”).

Synonyms

This word in other languages

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 "cognomen"?
"cognomen" is spelled C-O-G-N-O-M-E-N. The IPA pronunciation is /kɒɡˈnoʊ.mən/.
What does "cognomen" mean?
As a noun, "cognomen" means: A personal epithet or clan name added to the given name and family name of Ancient Romans.
How do you pronounce "cognomen"?
The IPA (International Phonetic Alphabet) transcription for "cognomen" is /kɒɡˈnoʊ.mən/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "cognomen"?
From Latin cognōmen, from con- (“with”) + nōmen (“name; family name”). 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.

Using “cognomen”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is C-O-G-N-O-M-E-N - every other letter order is a misspelling in standard orthography.
  • Say it as /kɒɡˈnoʊ.mən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list