What does Oneil mean and where does it come from?
Oneil is an anglicized form of the Irish name Ó Néill, which means 'descendant of Niall.' Niall is an ancient Irish name meaning 'champion' or 'cloud.' The name Oneil is less common as a female name and may be seen as a modern variation or adaptation. In Irish history, the Ó Néill family was a promi
Cultural significance
Oneil has been a cherished name across cultures, particularly in Ireland-speaking communities, where it reflects values of a beloved name with deep roots.
Peak popularity
Reached #3959 in 1918 — currently #10405 in the US.
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Related Reading
Ireland-origin baby names with timeless appeal
Browse names →How else can you spell Oneil?
Same sound, different look — useful if you want something slightly more distinctive
What middle names flow best with Oneil?
Oneil works best with short, strong middle names — one or two syllables keep the full name from becoming a mouthful
Oneil Jack
One syllable · timeless choice
Oneil John
One syllable · timeless choice
Oneil Luke
One syllable · timeless choice
Oneil Miles
One syllable · vintage charm
Oneil Beau
One syllable · on the rise
Oneil Brooks
One syllable · timeless choice
How popular is Oneil right now?
Falling — down 1601 spots — currently #10405 in the US out of 135.5k tracked names
| Year | US Rank | Births | vs Prior Year |
|---|
| 2025 | #10405 | 7 | ▼ down 1601 · -22% births |
| 2024 | #8804 | 9 | ▼ down 7660 · -99% births |
| 2023 | #1144 | 1,056 | ▲ up 5 · +2% births |
| 2022 | #1149 | 1,036 | ▲ up 5 · +3% births |
| 2021 | #1154 | 1,006 | ▲ up 3222 · +20020% births |
| 1915 | #4376 | 5 | — |
The story of Oneil
Oneil entered American naming records in 1915 and has been in use for over 109 years. With 1,736 total births recorded, Oneil remains relatively uncommon. The name has grown more popular over time, rising from #4376 in 1915 to #1144 in 2023. Oneil is used for both genders: 1% female and 99% male.
Names that peaked alongside Oneil in 1918:
Oneil by decade
Oneil peaked in the 1910s. See all 1910s names →
| Decade | Births | |
|---|
| 1890s | 5 | |
| 1910s | 127 | |
| 1920s ★ | 269 | |
| 1930s | 185 | |
| 1940s | 171 | |
| 1950s | 142 | |
| 1960s | 85 | |
| 1970s | 83 | |
| 1980s | 149 | |
| 1990s | 198 | |
| 2000s | 189 | |
| 2010s | 125 | |
| 2020s | 24 | |
💎With 1,736 total births, Oneil is an uncommon but established name.
What are good nicknames for Oneil?
What names sound and feel like Oneil?
Based on sound, origin, and style — parents who love Oneil also consider these
Common questions about the name Oneil
What does the name Oneil mean?
Oneil means "A beloved name with deep roots" — a name rooted in Ireland tradition that carries both historical depth and timeless appeal. The meaning reflects values that have made this name endure across generations.
How popular is the name Oneil?
Oneil is currently a distinctive and less common name as a baby name in the US and is holding steady in popularity, a reliable classic that parents consistently choose.
What is the cultural origin of Oneil?
Oneil originates from Ireland tradition. Ireland names tend to carry strong cultural heritage and have spread across the world through migration, literature, and religion over centuries.
Is Oneil a common or rare name?
Oneil is a distinctive choice that balances familiarity with individuality. It strikes a balance between standing out and fitting in.
Is Oneil more of a girl or boy name?
Oneil is a genuinely unisex name used for both boys and girls. The unisex quality makes it particularly versatile for modern families.