The Mairtine (Martini, Marthene, Muirtine, Maidirdine, Mhairtine) were an important people of late prehistoric Munster, Ireland who by early historical times appear to have completely vanished from the Irish political landscape.
This term has been translated as middle of the Mairtine [nation], indicating that modern-day Emly, County Tipperary, was the central capital of the tribe.
In an essay of 2000, Nollaig Ó Muraíle notes the remote possibility that some of the Mairtine Mór "might just" have been located in Connacht, though he does not specify where.
Dáibhí Ó Cróinín notes that in one tradition, preserved in the Book of Lecan's still unpublished genealogies, the Mairtine are said to have been expelled from the north of Ireland, or Leth Cuinn, and to have settled in the territory later known as In Déis Tuaisceirt, which would become Dál gCais.
I Dubhaltach MacFhirbhisigh records them in association with the Éarainn and Fir Bolg, listing them as the latter people in his Leabhar na nGenealach.
He first mentions them in the statement that "Conmhal mac Ebhir, ri Ereann, do bhris cath Locha Lén for Eurna, Mairtine, agus for Moghruith mac Mofebhis d'Fearuibh Bolg"/"Conmhal (Conmáel) s. Éibhear, king of Ireland, won the battle of Loch Léin (Lakes of Killarney) over the Éarainn, the Mairtine, and over Mogh Ruith (Mug Ruith?)
The Metrical Dindshenchas includes a passage which mentions "The three active Red Wolves of the Martine quenched the sturdy strength of the famous man: they took his head from him, whatever came of it."