Teagan
pronounced TEE-ganTeagan is a spelling of the Welsh name Tegan, which means “darling” and comes from the Welsh teg, “beautiful, pretty.”
No. 718 for girls in Ireland in 2025, with 4 baby girls.
More about TeaganIrish Names Starting with T
10 Irish names beginning with T for girls and boys, with what each one means and how to say it.
Updated October 2026
Irish girl names starting with T
Irish boy names starting with T
Tadhg
pronounced TI-gueIrish name meaning “a poet” or “a philosopher.”
No. 8 for boys in Ireland in 2025, with 286 baby boys.
More about TadhgTerence in Irish is Turlough, pronounced TUR-la, meaning “one who aids.”
No. 577 for boys in Ireland in 2025, with 5 baby boys.
More about TerenceTerry in Irish is Turlough, pronounced TUR-la, meaning “one who aids.”
No. 509 for boys in Ireland in 2025, with 6 baby boys.
More about TerryThomas in Irish is Tomas, pronounced toh-MOSS, meaning “twin.”
No. 16 for boys in Ireland in 2025, with 211 baby boys.
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Tiarnan
pronounced TEER-nawnTiarnán comes from tiarna “lord” with the diminutive -án, so “little lord.” It is the modern spelling of the older Tighearnán, and its anglicized form is Tiernan.
No. 252 for boys in Ireland in 2025, with 18 baby boys.
More about TiarnanTierney
pronounced TEER-neeMeaning “lord, chief” and implies “lord of the household.”
Rare in Ireland: fewer than three baby boys a year get the name.
More about TierneyTimothy in Irish is Tadhg, pronounced TI-gue, meaning “poet, philosopher.”
No. 329 for boys in Ireland in 2025, with 12 baby boys.
More about TimothyTomas
pronounced toh-MOSSTomás is the Irish form of Thomas, a biblical name that comes through Greek from the Aramaic Teʾoma, “twin.”
No. 95 for boys in Ireland in 2025, with 60 baby boys.
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Turlough
pronounced TUR-laFrom an Irish name meaning “one who aids or assists.” It is usually translated as Terence and Terry, two names that have become strongly associated with Ireland.
No. 829 for boys in Ireland in 2025, with 3 baby boys.
More about TurloughOf the 10 Irish names starting with T here, 1 are for girls and 9 for boys. The ones readers look up most are Tadhg, Tomas and Thomas.
Most popular in Ireland in 2025
The T names on this page that the most babies were given in 2025, by the Central Statistics Office’s ranking (girls and boys are ranked separately).