The ancient Kingdom of the Osraige, an early Erainn tribe whose first king was Aengus Osrithe, flourished in the second century of the Christian era. In the fifth century the neighbouring tribe of the Deisi, aided by the Corca Laighde, conquered South Ossory, and for over a century, the Corca Laighde chiefs ruled in place of the dispossessed Ossory chiefs.

The eastern part of Meath is also known as the kingdom of Brega. The name derives from the plain where Tara (Temuir), the ancient capital of Ireland, stood. For over 500 years, beginning with Niall of the Nine Hostages in 445 A.D., the Southern Ui Neill held the kingship at Tara, giving the title-holder the Kingship of Ireland as well.

Petty kingdoms took their place after the fall of Roman Britain in the 5th century AD and formed along old tribal lines, as well as new divisions of land created by Anglo-Saxon and Viking settlers. Many of the areas that would later form the historic counties of the British Isles had already taken shape by the time of the Norman conquest of England in 1066.

05/12/2017 · Ancient Irish Hierarchy. In the ancient times, during the government by kings; the country was divided into various territorial sub divisions. The whole county was divided into five provinces such as Leinster, East Munster, West Munster, Connaught and Ulster. With the course of time, the divisions modified.

Kingdom of Laigen - Mapping Ancient Leinster Tribes of Laigen - Early Tribal Genealogy of Leinster The Ossory Region - Tribes and Clans of Osraighe Kings of Leinster - and the Lords of Osraighe Annals of Laigen - Early Leinster and the Irish Annals; Kingdom of Mumhan - Mapping Ancient Munster The Thomond Region - Dál gCais, et al

Older indigenous kingdoms underlay this division, however. Wexford was based on the Mac Murchada kingdom of Uí Chennselaig and Kilkenny on the Mac Gilla Pátraic kingdom of Osraige. Kildare appears to have been based on the over-kingdom of …

Annals of Laigen - Early Leinster and the Irish Annals; Kingdom of Mumhan - Mapping Ancient Munster The Thomond Region - Dál gCais, et al; Kings of Munster - Lords of Mumhan; Annals of Mumhan - Early Munster and the Irish Annals; Kingdom of Uladh - Mapping Ancient Ulster The Airghialla Region - Descent from the three Collas; Tribes of Northern Ui Neill.