Boy Name · Irish Origin
Oneil
Last reviewed: June 2026
Oneil — a boy name from the Irish tradition — is an uncommon, standout choice. Its meaning, "Descendant of Niall", anchors the name in something deeper than sound alone. If Oneal is on your shortlist, Oneil belongs in the same conversation.
Names like Oneil
Frequently asked about Oneil
What does the name Oneil mean?
Oneil means "Descendant of Niall" and is of Irish origin.
What is the origin of Oneil?
Oneil originates in Irish naming tradition.
How do you pronounce Oneil?
Oneil has 5 letters and is most commonly stressed on the first syllable.
Is Oneil a boy's or girl's name?
Oneil is primarily used as a boy's name in US records.
How popular is Oneil in 2026?
In our 2026 popularity tracker, Oneil sits in the Rare tier — an uncommon, standout choice.
What names are similar to Oneil?
Names that share Oneil's sound and style include Oneal, Onalee, Onnie, Orvil, Ona.