Tiernan
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Meaning
an English spelling of the Irish name Tighearnán
How popular is Tiernan around the world?
In the United States, 180 babies were named Tiernan between 2020 and 2025. In Ireland, 48 boys named Tiernan were born in 2025, the 115th most common name among boys that year.
Tiernan is on the official records of the United States, Ireland, Scotland, Canada and England and Wales.
United States
1 in 120,000
In the United States, 180 babies were named Tiernan between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Tiernan peaked in the 2000s and the 2010s in nearly equal measure.
Births with a Social Security record. Source: U.S. Social Security Administration
Ireland
1 in 1,100
In Ireland, 48 boys named Tiernan were born in 2025, the 115th most common name among boys that year.
share of that year’s name registrations
Exact registered spellings from Irish vital statistics; any name under 3 in a year is withheld at source, and accented spellings (fadas) are recorded reliably only from 2018. This registry counts each spelling separately; the figures above are for the exact spelling Tiernan, and accented spellings are separate names. Source: Central Statistics Office (Ireland), Irish babies' names
Scotland
1 in 11,000
In Scotland, 4 boys named Tiernan were registered in 2024, the 619th most common name among boys that year.
The count never rose above 6 in a year, too few to chart.
Births registered in Scotland; different spellings count separately but accents are merged at source, and any spelling under 3 in total is suppressed. Source: National Records of Scotland, babies' first names
Canada
1 in 61,000
In Canada, 6 boys named Tiernan were born in 2024, ranked 2,855th among boys that year.
share of that year’s name registrations
First given names from provincial and territorial vital statistics across Canada; any name-sex-year under 5 is excluded at source, and small Quebec counts carry a randomized adjustment made at source. Shares divide by Statistics Canada’s count of live births for the year; the 2024 count is preliminary. Source: Statistics Canada, first names at birth (table 17-10-0147-01)
England and Wales
1 in 84,000
In England and Wales, 7 boys named Tiernan were born in 2025, ranked 2,952nd among boys that year.
share of that year’s name registrations
Birth registrations in England and Wales (not the whole UK); exact spellings are counted separately, and any spelling under 3 in a year is withheld at source. Source: Office for National Statistics, baby names in England and Wales
South Australia
last on record 2014
Tiernan is not on the 2017 record for South Australia, whose registry publishes every name given that year.
The count never rose above 1 in a year, too few to chart.
Births registered in South Australia (not all of Australia) by first name and year of registration, 1944–2017, from the state’s Births, Deaths and Marriages registry, which publishes every name down to a single birth in capitals; a spelling its export repeats inside a year is counted once, and from 2018 only a top 100 is published, so the series ends at 2017. Source: Consumer and Business Services (South Australia), popular baby names
Not on the record in Spain, Mexico City, Argentina, Puerto Rico, New Zealand and Poland: those registries withhold small counts, so rare uses may sit below their floors.
Not on the Chile record: nametree keeps spellings that reached 5 registrations in some year, so rarer uses are not shown. Not on the Montevideo record for 1940 to 2011: that registry withholds nothing, so this spelling was not given there in those years. Not on the France record: nametree keeps spellings that reached 20 births in some year, so rarer uses are not shown. Not on the Austria record for 1984 to 2025: Statistik Austria publishes every first name down to a single birth, so this name was not given there in those years (before 2010 the record covers babies with Austrian citizenship only). Not on Norway’s list: Statistics Norway lists only first names carried by 200 or more living people, so rarer names are not shown.
When you meet Tiernan
Most people given the name Tiernan in the United States are teenagers or young adults today.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Tiernan deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Tiernan truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Tiernan fits with your family’s names and surname.
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