How common is the O'Neill surname?

There are approximately 320,000 people with the surname O'Neill in the United States.

Are there O'Neill soldiers in Civil War records?

Yes, 686 soldiers with the O'Neill surname appear in Civil War records.

O'Neill

Q: What does the surname O'Neill mean?

The surname O'Neill means "Descendant of Niall, derived from the Gaelic 'niall' meaning 'champion' or 'cloud.'". It is of Irish origin.

Patronymic

Meaning

Descendant of Niall, derived from the Gaelic 'niall' meaning 'champion' or 'cloud.'

Etymology

The surname originates from the Irish 'Ó Néill,' where 'Ó' denotes 'descendant of' and Niall is a personal name. The etymology of Niall is debated, with some sources suggesting 'champion' and others proposing 'cloud' or 'passionate.'

About the O'Neill Surname

O'Neill is one of Ireland's most significant surnames, originating from the powerful O'Neill dynasty of Ulster. The family played a crucial role in Irish history, particularly during the Nine Years' War and subsequent periods.

Distribution & Frequency

Estimated 320,000 bearers in the United States #211 most common surname

Rare Common

Primarily found in Ulster, particularly in County Tyrone and County Antrim, with major populations in the United States, Canada, Australia, and the United Kingdom.

O'Neill Surname Distribution

Geographic distribution based on Civil War military records.

Fewer

Charles O'Neill

Hon.

Mickey O'Neill

Richard O'Neill

Quick Facts

Origin: Irish
Classification: Patronymic
Estimated Bearers: 320,000

War Records

686 soldiers with the O'Neill surname found in Civil War records.

Search war records →