MallowbyNames

Oniel

oh-NEEL · Of uncertain origin; possibly an Anglicized form of Irish Ó Néill, meaning 'descendant of Niall', which may derive from an old Gaelic word for 'champion'.

2025 rank (boys)
#8,910
Babies named in 2025
8
Peak popularity
1913
2025 frequency
1 in 213,510 boys
Usually for
Boys
Trend
Holding steady

Holding steady, #8,910 for boys today.

Popularity of Oniel since 1913

Babies named Oniel per year in U.S. Social Security records. Raw births topped out in 1993, but relative to how few babies were recorded back then, Oniel's real moment was 1913.

4913192019602000Most births 1993Boys
Data table (by decade)
DecadeBoys
1910s6
1920s17
1930s5
1940s0
1950s0
1960s0
1970s5
1980s30
1990s52
2000s64
2010s39
2020s36

Meaning & origin

Oniel is a rare given name derived from the Irish surname O'Neill. It first appeared in U.S. birth records in 1913, which also remains its peak year of usage. As of 2025, it ranked 8,910 with a frequency of 1 in 213,510 male births, indicating it has never entered mainstream popularity. The trajectory has remained stable, with only sporadic usage over the decades. While no top states have recorded significant use, Oniel reflects a broader trend of adopting surnames as first names, particularly those with strong Irish heritage.

Oniel is a variant spelling of the traditional Irish patronymic surname O'Neill. The surname comes from the Gaelic Ó Néill, meaning 'descendant of Niall'. The personal name Niall is of uncertain derivation, but it is often associated with the Gaelic word 'niadh', meaning 'champion' or 'cloud'. As a given name, Oniel is uncommon and likely emerged as a re-spelling of the surname, used in English-speaking countries.

Nicknames & variants

Nicknames: O, Neil, Niel

Variants: O'Neill, O'Neil, Oneil

Sibling names for Oniel

Names that share Oniel's style, for a brother or sister.

A parent animal hugging its little one, the personalized name page

O is for Oniel, our favorite little boy.

O is for Oniel…”

In a Mallowby alphabet book, Oniel's letter becomes Oniel's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Oniel's book

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Questions parents ask

What does the name Oniel mean?
Oniel is a variant of the Irish surname O'Neill, meaning 'descendant of Niall'. The personal name Niall is often interpreted as 'champion' or 'cloud'.
How popular is the name Oniel currently?
Oniel is very rare. In 2025, it ranked 8,910 in the United States, with about 1 in 213,510 male newborns given this name.
Is Oniel a boy's or girl's name?
Oniel is predominantly used as a masculine name, consistent with its Irish surname origin.