Tiernan
Boy nameTiernan has been given to 1,676 babies in the U.S. since 1985. It peaked in 2009. In 2025, about 1 in 58,899 boys was named Tiernan.
Meaning & origin
From Irish Tiarnán, from Tiarna (“lord”).
Etymology adapted from Wiktionary, licensed CC BY-SA 4.0.
Popularity over time births per year, 1880–2025
Total babies
1,676
Peak year
2009 (95 babies)
Rank in 2025
Below top 1000
First recorded
1985
10-year trend
▼ -43%
Gender split
12% girls / 88% boys
Names with a similar vibe
Same primary gender, peaked around the same years, and roughly as common as Tiernan.
Sibling name ideas for Tiernan
Same era and popularity as Tiernan, avoiding matching initials or rhymes.
FAQ
How popular is the name Tiernan?
Tiernan has been given to 1,676 babies in the U.S. since 1985. It ranked below the top 1000 in 2025.
When did the name Tiernan peak?
Tiernan peaked in 2009, when 95 babies were given the name.
Is Tiernan a girl or boy name?
Tiernan is primarily a boy name (88% of babies named Tiernan are boys).
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