Tiernan
Tiernan was the 3840th most popular name for boys in 2025, given to 29 babies. Its best year was 2007, when it ranked 1738th with 86 babies. Over the last ten years it has moved down 1,162 places. More babies were named Tiernan in the 2000s than in any other decade.
Meaning Not yet researched how we research meanings
- Rank in 2025
- #3,840 boys, up 1,003 places since 2020
- Babies in 2025
- 29boys
- Girls and boys
- Almost always a boy’s name2021–2025
- Peak year
- 200786 babies
- Total since 1880
- 1,676babies recorded
Tiernan popularity since 1880
| Year | Rank (girls) | Rank (boys) | Babies (girls) | Babies (boys) |
|---|---|---|---|---|
| 2025 | — | #3,840 | — | 29 |
| 2020 | — | #4,843 | — | 20 |
| 2010 | #19,606 | #1,937 | 5 | 73 |
| 2000 | #9,127 | #2,371 | 11 | 41 |
| 1990 | — | — | — | — |
| 1980 | — | — | — | — |
| 1970 | — | — | — | — |
| 1960 | — | — | — | — |
| 1950 | — | — | — | — |
| 1940 | — | — | — | — |
| 1930 | — | — | — | — |
| 1920 | — | — | — | — |
| 1910 | — | — | — | — |
| 1900 | — | — | — | — |
| 1890 | — | — | — | — |
| 1880 | — | — | — | — |
How popular is Tiernan, counting every spelling?
Tiernan has no other common spelling that sounds the same.
How many kids will share the name Tiernan?
29 of the 3,606,400 babies born in the US in 2025 were named Tiernan (0.01 per 1,000 births). For a boy named Tiernan born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 291 (of 430 pupils) would have a child named Tiernan.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Tiernan?
About 1,500 people born in the US named Tiernan are alive today, with a median age of 18; half are between 12 and 23. That makes Tiernan mostly worn by children and young adults.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Tiernan by state
How common Tiernan was among boys born in each state in 2021–2025. In 49 states fewer than five boys a year got the name, too few for SSA to publish, so those states show as zero.
Names with a similar history
These names rose and fell in step with Tiernan: their share of US boys followed the most similar curve since 1880. If you like Tiernan, they share its era and feel.
Questions about the name Tiernan
How popular is the name Tiernan?
Tiernan was the 3840th most popular name for boys in 2025, given to 29 babies. Its best year was 2007, when it ranked 1738th with 86 babies. Over the last ten years it has moved down 1,162 places. More babies were named Tiernan in the 2000s than in any other decade.
Is Tiernan a boy or girl name?
In 2021–2025, almost always a boy’s name given the name Tiernan in the US.
Where is Tiernan most popular?
In 2021–2025, Tiernan was most common in Pennsylvania (0.02 per 1,000 boys), followed by California and California.