Oneill
Boys' nameMeaning not yet documented
Oneill has been given to 87 babies in the U.S. since 1918. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 2010, with 8 recorded.
Babies named Oneill, 2017
1 in 715,000
Oneill over time, 1880–2025
Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.
How common is Oneill?
Oneill had fewer than 5 recorded uses in 2025, so these figures use 2017, the last year it was published.
- Among all babies, 2017
- 1 in 715,000
- 5 of 3,577,106 births
- Among boys only
- 1 in 370,000
- <0.01% of boys
- Rank, 2017
- Unranked
- Fewer than 5 uses
- Coin-flip room size
- 495,893 kids
- Even odds of a second one
Where Oneill sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2017 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 495,893 children born in 2017 and it's an even bet that one of them is another Oneill. In a class of 30 the chance is Under 1%.
When Oneills were born
Half of everyone ever recorded as Oneill was born before 1988 — so the typical Oneill is around 37 today.
- Biggest decade
- 1980s
- 29.9% of all use
- Born in the last 25 years
- 34.5%
- Spread across generations
- Recorded since 1950
- 61
- People you could plausibly meet
1980s — 29.9% of all recorded uses (26).
Is Oneill rising or falling?
Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.
- Rank vs 1 year ago
- —
- Not ranked then
- Rank vs 5 years ago
- New entry
- Not ranked then
- Rank vs 10 years ago
- —
- Not ranked then
- Births vs 10 years ago
- —
- Not published both years
- Share of its own peak
- 0%
- Peak was 2010 (8)
- Years since peak
- 15
- Years
- Year-to-year steadiness
- Steady
- 6.7% average annual change
Spellings of Oneill
Oneill is not the most common spelling — Neil is, with 77.4% against Oneill's 0.06%.
Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.
Oneill around the world
Where Oneill ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.
- England & Wales2003–2003#3,467in 2003
- France2007–2015#6,001in 2015
Popularity data from Office for National Statistics and Institut national de la statistique et des études économiques. ONS data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0.
Oneill by the numbers
The raw record for each sex the name is used for.
Names similar to Oneill
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Oneill
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.