Little lord or master
Derived from the Irish Gaelic word 'tighearna' meaning 'lord' or 'master', combined with a diminutive suffix. It was historically used as a title and a given name among Irish nobility, most notably by the 12th-century King of Breifne.
About 29 boys were named Tiernan in 2025.
US births per 5-year period, 1990–present (SSA data).
12th-century King of Breifne in Ireland
British stand-up comedian and actor
Gaelic footballer for Tyrone
