Oneill
The O'Neill dynasty are a lineage of Irish Gaelic origin that held prominent positions and titles in Ireland and elsewhere. As kings of Cenél nEógain, they were historically one of the most prominent family of the Northern Uí Néill, along with the O'Donnell dynasty.
Meaning & Origin of Oneill
What this name means, where it came from, and how it has traveled across cultures.
The O'Neill dynasty are a lineage of Irish Gaelic origin that held prominent positions and titles in Ireland and elsewhere. As kings of Cenél nEógain, they were historically one of the most prominent family of the Northern Uí Néill, along with the O'Donnell dynasty.
Source: Wikipedia (CC BY-SA 3.0). Read more →
The Story of Oneill
Oneill first appeared in U.S. Social Security Administration records as a baby boy name in 1918, with 5 babies given the name that year. Its peak popularity came in 2010, when 8 Oneills were born — ranking #8,802 that year. As of 2026, Oneill ranks #12,243 for baby boys with 5 births, with steady use. In total, more than 87 Oneills have been born in the U.S. since records began in 1880, spanning the 1910s through the 2020s.
Popularity Over Time
Popularity by State
Names that sound like Oneill
Phonetically similar names — useful when Oneill is the vibe but a different syllable count or letter feel might suit better. Linked entries have a profile on Peek a Name.
Source: Datamuse . Phonetic similarity ranking, not curated.
Frequently Asked Questions about Oneill
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About the name Oneill
Oneill is a boy baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 1918 and has accumulated 87 births in the dataset. Oneill's peak popularity came in 2010 when it ranked #8,802. Use the chart and map above to compare Oneill's trajectory across years and U.S. states, or browse the related names section to discover similar choices.
Continue exploring
- Top names of 2010 →
- Names of the 2010s →
- Names starting with "O" →
- Browse all boy names →
- Top names of 2026 →
Data sources
- Birth statistics (counts, ranks, years 1880–2026) — U.S. Social Security Administration . Predictions for years not yet released by SSA are computed by Peek a Name from historical trends; we update with official data as soon as it ships.
- Etymology, cultural origins, and related forms — Behind the Name (used under their public API terms).
- Meaning prose and editorial summary — Wikipedia article extracts, licensed under CC BY-SA 3.0 .
- Predicted nationality distribution — Nationalize.io .
- Phonetically similar names — Datamuse .
Peek a Name aggregates and presents the above data for informational purposes. Statistical predictions and external attributions are clearly labelled where shown; we make no guarantee of accuracy beyond what each source provides.