Tiernan vs Tierney
American parents have registered 3,979 Tierneys since 1880, against 1,676 Tiernans. But in 2025 it was Tiernan that was commoner, 29 babies to 15.
Babies given each name, 1880–2025
Tiernan Tierney
Each line is every baby given the name that year, girls and boys added together — the only count that means the same thing for both names. A line breaks where the name fell below five babies in a year — the point at which the SSA stops publishing it — rather than being drawn through a figure nobody published. A single published year in a gap shows as a dot.
Who was ahead
Of the 69 years in which either name was published, Tierney for 58 years and Tiernan for 11 years. The lead changed hands 11 times.
Side by side
| Tiernan | Tierney | |
|---|---|---|
| Total US births | 1,676 | 3,979 |
| Most in one year | 95 | 172 |
| Babies in 2025 | 29 | 15 |
| Estimated living today | 1,700 | 3,900 |
| Median age today | 17 | 28 |
| Peak year | 2007 | 1993 |
| Best rank | 1,728th boys | 1,059th girls |
| Rank in 2025 | 3,757th | 7,133rd |
| First recorded | 1985 | 1957 |
| Girls / boys | 195 / 1,481 | 3,956 / 23 |
A rank is a position within one sex’s list for one year, so the two rank rows are not subtracted from one another and the winning column is not marked on them. The living figure is a life-table estimate, not a count.
Which name is older
Half of the Tierneys alive today are over 28; half the Tiernans are over 17. That is 11 years between them: two names in use at the same time, worn by two different generations.
Where each one is strongest
- Tiernan New York (4.2×), California (2.6×), Pennsylvania (2.5×)
- Tierney Tennessee (5.4×), Pennsylvania (2.2×), Florida (2.0×)
How much commoner the name is in that state than it is nationally, from births recorded since 1910.
Both names abroad
Countries whose statistics office publishes both names, so the comparison can be made somewhere other than the United States.
| Country | Tiernan | Tierney |
|---|---|---|
| England and Wales | 384 | 563 |
| Scotland | 51 | 31 |
Every spelling a country files separately is added together, over whatever years that country publishes — which is not the same range in any two of them, so read the columns against each other and not the rows.
Compare something else
Related comparisons
Social Security Administration birth records, 1880–2025, public domain. Full histories: Tiernan and Tierney.