Irish boy name
Tiernan Name Meaning, Origin & Pronunciation
Tiernan means little lord. Anglicised form of Tighearnán, from tighearna, 'lord', with a diminutive
Tiernan is the anglicised form of Tighearnán, a diminutive of the word for lord. It has been used in Ireland since the early medieval period, and one of the best-known bearers was Tighearnán Ua Ruairc, the twelfth-century king of Breifne. The name also lives in the Irish surname Tiernan, found in Counties Cavan and Leitrim. Tiernan is easy to read and pronounce in English, with a pleasant, gentle sound that works for children and adults alike. It suits parents seeking a classic Irish name with a regal meaning but a modest feel.
Variants of Tiernan
TiarnánTiernánTiarnan
Well-known people named Tiernan
Tighearnán Ua Ruairc.
Tiernan popularity: Ireland vs the US
In 2025 Tiernan ranked #113 in Ireland (51 babies) and #3,840 in the US (29 babies). It is far more popular in Ireland than in America.
Ireland (boys)United States (boys)
Rank among babies of the same sex, 1 = most popular (log scale). Ranks below #10,000 sit on the bottom edge. Gaps mean fewer than 3 Irish or 5 US babies that year.
Data: US Social Security Administration (public domain) and Central Statistics Office, Ireland (CC BY 4.0). Irish accented spellings (such as Síle) are only recorded from 2018, so earlier years combine spellings.
Frequently asked questions
What does the name Tiernan mean?
Tiernan means "little lord". Anglicised form of Tighearnán, from tighearna, 'lord', with a diminutive.
How do you pronounce Tiernan?
Tiernan is pronounced TEER-nan.
What is the origin of Tiernan?
Tiernan is of Irish origin. Anglicised form of Tighearnán, from tighearna, 'lord', with a diminutive.