Oneil
#10,401 in 2025Boys' nameMeaning not yet documented
Oneil has been given to 1,774 babies in the U.S. since 1892. In 2025 it ranked #10,401 of 13,926 boys’ names in use. Its peak year was 1924, with 38 recorded.
Babies named Oneil, 2025
1 in 474,000
Oneil 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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.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 Oneil?
Everything below is computed from the 2025 data — the most recent year available.
- Among all babies, 2025
- 1 in 474,000
- 7 of 3,315,165 births
- Among boys only
- 1 in 244,000
- <0.01% of boys
- Rank, 2025
- #10,401
- of 13,926 boys’ names in use
- Coin-flip room size
- 328,272 kids
- Even odds of a second one
Where Oneil sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 328,272 children born in 2025 and it's an even bet that one of them is another Oneil. In a class of 30 the chance is Under 1%.
When Oneils were born
Half of everyone ever recorded as Oneil was born before 1959 — so the typical Oneil is around 66 today.
- Biggest decade
- 1920s
- 15.0% of all use
- Born in the last 25 years
- 19.4%
- Spread across generations
- Recorded since 1950
- 1,017
- People you could plausibly meet
1920s — 15.0% of all recorded uses (264).
Is Oneil 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
- −1,602
- Places dropped
- Rank vs 5 years ago
- −1,084
- Places dropped
- Rank vs 10 years ago
- −1,870
- Places dropped
- Births vs 10 years ago
- 0.78×
- Fewer babies than then
- Share of its own peak
- 18.4%
- Peak was 1924 (38)
- Years since peak
- 101
- Years
- Year-to-year steadiness
- Volatile
- 29.1% average annual change
Spellings of Oneil
Oneil is not the most common spelling — Neil is, with 52.0% against Oneil's 0.87%.
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.
Where Oneil is used
Across 1910–2025, Oneil was most concentrated in Louisiana — about 1 in 20,000 boys, against 1 in 85,614 across all states with data. It was least common in North Carolina (1 in —).
Most concentrated
- 1Louisiana1 in 20,000
- 2Maine1 in 100,000
- 3New York1 in 100,000
- 4South Carolina1 in 100,000
- 5Florida1 in —
- 6North Carolina1 in —
Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Oneil has too little recent state data to map, so this covers all years from 1910.
Oneil around the world
Where Oneil 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 & Wales1996–2009#4,527in 2009
- France1998–2017#5,887in 2017
- Canada1993–2000#2,026in 2000
Popularity data from Office for National Statistics, Institut national de la statistique et des études économiques and Statistics Canada. ONS data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0. StatCan data under Statistics Canada Open Licence.
Oneil by the numbers
The raw record for each sex the name is used for.
As a boy's name
Names similar to Oneil
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Oneil
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.