1,313births recorded
4Countries
1Variants
2001Peak · Northern Ireland
#120Northern Ireland 2025
Tiarnan is a boy name family recorded 1,313 times in 4 countries since 1990. It ranks highest today in Northern Ireland (#120 in 2025). Its all-time peak was in Northern Ireland in 2001, at 247.3 births per 100,000.
Popularity by country
Births per 100,000 newborns, all forms of the name combined.
All forms of Tiarnan
| Variants | Language | Total births | Country | Latest rank | Peak year | 10-year trend |
|---|---|---|---|---|---|---|
| Tiarnan | English | 696 | 🇬🇧 Northern Ireland | #120 | 2001 | ▲ 139 % |
| Tiarnan | English | 536 | 🇮🇪 Ireland | #252 | 2018 | ▲ 20 % |
| Tiarnan | English | 55 | 🏴 England & Wales | – | 1999 | – |
| Tiarnan | English | 26 | 🇺🇸 United States | – | 2002 | – |
Questions about Tiarnan
How popular is the name Tiarnan?
In 2025 it ranked #120 in Northern Ireland. Official registers record 1,313 births across 4 countries.
When was Tiarnan most popular?
It peaked in Northern Ireland in 2001, at 247.3 births per 100,000.
Is Tiarnan a boy or a girl name?
In official birth registers, Tiarnan is a boy name.