Oneil

A unisex name of Irish origin, meaning descendant of Niall; a form of O'Neill.

Babies a year
14
the US, 2017
Rarity
Very rare
among names in use
US popularity
—
outside the top 1000
UK popularity
—
outside the ONS list

Oneil by the numbers

Oneil was given to 14 American babies in 2017, the most recent full year we hold.

Its American peak was 38 babies in 1924, making it a 1920s name.

Other names that come from Niall

Like Oneil, each of these traces back to Niall: a form of it, a name built from it, or a son or daughter of it. Not always the same sex.

  • Niallcloud, champion46 in England and Wales (2025)
  • Neelychampion; a form of Neill or Niall37 in the US (2017)
  • Nualawhite shoulder; feminine form of Niall27 in England and Wales (2025)
  • Nialchampion or noble; variant of Niall3 in England and Wales (2025)

Spelled almost the same

Other names in the records within a letter or two of Oneil. Close spellings are not always related names, but they are usually worth seeing together.

  • Onealdescendant of the champion; related to O'Neill6 in the US (2017)

Sounds like Oneil

Names that are said the same way as Oneil, however they are written. Sounding alike does not mean they share a history.

  • Oneilldescendant of Niall; a form of O'Neill5 in the US (2017)

Names about as common as Oneil

BrelandBrittAoiArySheikhBritishAmericusCasie

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