placenamesTerryglass
Tír Dhá Ghlas
Terryglass connects medieval scholarship with the surviving fabric of a fortified settlement beside Lough Derg.
The name
These Irish name elements are associated with this record in the Logainm glossary.
An element’s translation is a clue, rather than a complete explanation of the name. Its form and meaning depend on local history and the full Irish name.
Recorded forms
- Tír Dhá Ghlas · Irish · main form · validated name
- Terryglass · English · main form
Place & story
An abbot and the Book of Leinster
Áed Úa Crimthainn, abbot of Terryglass, was a principal writer of the twelfth-century Book of Leinster. The manuscript brings together early Irish stories, genealogies, medical learning and place-name lore. Among its major texts are Lebor Gabála Érenn and a version of the Táin Bó Cúailnge. Its survival gives Terryglass an enduring connection with medieval Irish scholarship. [2]
The castle remains
The ruined castle at Terryglass stands near Lough Derg’s northeastern shore. Its four circular towers are dated by the Office of Public Works to the period 1219–1232, under the Marshalls. Thick connecting walls enclosed a rectangular defended space, with arrow loops and later openings for guns. A spiral stair survives in the northwestern tower. The monument is in state guardianship, with no public access. [3]
Geographic information
- Place type
- Population centre
- County
- Tipperary
- Barony
- Ormond Lower
- Civil parish
- Terryglass
- Coordinates
- 53.05949, -8.20884 (approximate)
- Logainm ID
- 1414387 ↗
Sources & further reading
- Logainm.ie — Terryglass. Place names and geographic record, licensed under CC BY 4.0.
- Book of Leinster: Director’s Choice Uncut · Caoimhe Ní Ghormáin, Trinity College Dublin Library
- Terryglass Castle · Office of Public Works
Name record retrieved 2026-10-25 · Source record modified 2015-10-08. How this page was prepared.