Kilroy

/ˈkɪlɹɔɪ/

//ˈkɪlɹɔɪ// name

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

"kilroy" is a 6-letter English headword indexed on PlainSpell.

The verdict

“Kilroy” is uncommon English (frequency #66,786 among 9,255 “K” headwords), classed as a proper noun. The kind of spelling people second-guess.

#66,786
frequency rank, English
9,255
“K” headwords

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

Key facts for Kilroy
PropertyValue
HeadwordKilroy
LanguageEnglish
Part of speechProper noun
IPA/ˈkɪlɹɔɪ/
Letters6
Frequency rank#66,786
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “Kilroy” 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). Kilroy lands here:

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

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

Rare enough to double-check

Kilroy is uncommon English at frequency #66,786 among 9,255 “K” headwords, classed as aproper noun, transcribed /ˈkɪlɹɔɪ/. Rarity is why readers land here mid-draft. Gloss: "A surname from Irish.".

No generated misspelling entries exist for Kilroy in our index, a straightforward case of a spelling with little room for common typos. Our confusable-pair dataset has no match for it, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: Derived from Irish Mac Giolla Ruaidh. The correct English form is Kilroy, spelled K-I-L-R-O-Y.

Definition

  1. 1
    A surname from Irish.

Etymology

Derived from Irish Mac Giolla Ruaidh.

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 "Kilroy"?
"Kilroy" is spelled K-I-L-R-O-Y. The IPA pronunciation is /ˈkɪlɹɔɪ/.
What does "Kilroy" mean?
As a proper noun, "Kilroy" means: A surname from Irish.
How do you pronounce "Kilroy"?
The IPA (International Phonetic Alphabet) transcription for "Kilroy" is /ˈkɪlɹɔɪ/. 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 "Kilroy"?
Derived from Irish Mac Giolla Ruaidh. 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 “Kilroy”

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

  • The one correct English spelling is K-I-L-R-O-Y - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈkɪlɹɔɪ/ (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

Other uncommon English words near this rank

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