Champion or descendant of Niall
Oneil is a variant of the Irish surname O'Neill, derived from the Gaelic 'Ó Néill'. It signifies a descendant of Niall, a name traditionally associated with Niall of the Nine Hostages, a legendary High King of Ireland. The root 'Niall' is often interpreted as meaning champion or cloud.
Less common today
Oneil isn't in the latest US Top 1000. It last peaked at #2,583 in 1993.
US births per 5-year period, 1990–present (SSA data).
Former NFL offensive lineman
Professional soccer player
