O'Fallon

name

By · According to Wiktionary data (CC BY-SA) ·

"o-fallon" is a 7-letter English headword indexed on PlainSpell.

The verdict

“O'Fallon” is an uncommon English word, ranked #87,625 in English word frequency and used as a proper noun.

#87,625
frequency rank, English
8
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A surname from Irish.

Key facts for O'Fallon
PropertyValue
HeadwordO'Fallon
LanguageEnglish
Part of speechProper noun
Letters8
Frequency rank#87,625
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “O'Fallon” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). O'Fallon lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for O'Fallon is 8 letters long, classified as a proper noun. Corpus data places it at rank #87,625 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 3 distinct senses for this headword, so context determines which meaning a reader should apply.

No misspelling variants are generated for O'Fallon in our index, since its letter sequence doesn't invite the usual edit-distance slips. Our confusable-pair dataset has no match for it, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: See Fallon. The correct English form is O'Fallon, spelled O-'-F-A-L-L-O-N.

Definition

  1. 1
    A surname from Irish.
  2. 2
    A city in St. Clair County, Illinois, United States.
  3. 3
    A city in St. Charles County, Missouri, United States.

Etymology

See Fallon.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "O'Fallon"?
"O'Fallon" is spelled O-'-F-A-L-L-O-N.
What does "O'Fallon" mean?
As a proper noun, "O'Fallon" means: A surname from Irish.
What is the origin of the word "O'Fallon"?
See Fallon. 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 “O'Fallon”

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

  • The one correct English spelling is O-'-F-A-L-L-O-N - every other letter order is a misspelling in standard orthography.
  • 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