Oneil
BoyIrish
Oneil is a boy name of Irish origin meaning "descendant of Niall, meaning champion".
About this name
Gender
Boy
Language
Irish
Religion
Christian
Popularity
2 / 100
Syllables
2
Length
5 letters
Meaning
descendant of Niall, meaning champion
Etymology
Oneil is a name of Irish origin derived from the Gaelic Ó Néill, meaning ‘descendant of Niall’; Niall is an old Irish personal name possibly meaning ‘champion’ or ‘cloud’. The surname later became used as a given name.
Frequently Asked Questions About Oneil
What does the name Oneil mean?
Oneil means "descendant of Niall, meaning champion", and is of Irish origin.
What is the origin of the name Oneil?
Oneil originates from Irish, commonly used in Europe.
Is Oneil a boy or girl name?
Oneil is typically used as a boy name.
What religion is the name Oneil associated with?
Oneil is associated with Christian.
Last updated: June 2026