Barons and castellans · Lordship of Ireland · as at first light, 1 January 1200

Mullingar

The Petit barony of Mullingar in the lake country of Westmeath.

Who he is

Name
William le Petit or his heir (not pinned)
Title
Baron of Mullingar (Magheritherinan)
Since
Hugh de Lacy's grant
Born
Not pinned
Family
See research
Confidence
low

William le Petit, briefly justiciar about 1191, held Mullingar; whether he is alive and holding on 1 January 1200 is not pinned.

Overlord

Walter de Lacy, lord of Meath

What it holds

  • Mullingar and the barony of Magheritherinan

How it was acquired

Enfeoffed by Hugh de Lacy (1172-86), as recorded in the Song of Dermot and the Earl.

Allies and rivals

The lord of Meath; the Irish of the neighbouring tuatha.

How things stand that morning

Held.

Wealth

Cattle and grain of the Meath plain.

Military

A motte and bailey at the caput.

Threats

  • Irish raids from the neighbouring tuatha

Places of note

  • Mullingar caput: Caput of the barony

Where the sources disagree

Evidence: Grant from the Song of Dermot and Orpen; the holder on 1 January 1200 is not pinned.

On the map: The caput and the land round it; bounds approximate.

Primary sources for Lordship of Ireland

Chronicles, registers, sagas and inscriptions written in or near 1200 that cover this entry. Each has its own page with editions, translations and where to read it.

  • Annals of Clonmacnoise, Anonymous; English translation of a lost Irish chronicle by Conall Mac Geoghegan (medieval original lost; translated 1627). A midland chronicle, tied to Clonmacnoise and the kings of Meath and Connacht, surviving only in a 1627 translation. Read online
  • Annals of Inisfallen, Anonymous (monks of Inisfallen, Kerry, and earlier of Emly and Lismore) (the manuscript was written in 1092 and continued at Inisfallen in many contemporary hands to 1450). The Munster chronicle, written in Kerry in a hand close to the events. Read online
  • Annals of Loch Ce, Various (compiled for the Mac Diarmada of Moylurg) (compiled 1580s from older annals; the medieval section rests on a Connacht chronicle). The fullest Connacht account of the year: Cathal Carrach's seizure of the kingship, Cathal Crobderg's flight north, the Connacht expedition of de Courcy and the Ui Neill on Crobderg's behalf and its defeat, William de Burgh's role, and the devastation of the province's churches, with the names of the Connacht nobles and clergy who died. Read online
  • Annals of the Kingdom of Ireland by the Four Masters, Various; compiled by Micheal O Cleirigh and others (1632 to 1636, from medieval annals now partly lost). A seventeenth century compilation but it draws on lost medieval annals, so its 1200 entries add names and incidents missing elsewhere: the Connacht war and the English of Meath and Munster, the deaths of Irish kings and churchmen across the island, and raids in Thomond and Desmond. Read online
  • Annals of Ulster, Various; compiled by Cathal Mac Maghnusa (compiled about 1498 from much older annals; the entries for 1200 derive from contemporary record). The most reliable Irish annal for the north. Read online
  • Chronicle of Roger of Howden, Roger of Howden (about 1192 to 1201). The fullest single narrative for the year. Read online
  • Mac Carthaigh's Book (Miscellaneous Irish Annals), Anonymous (a Munster compilation) (compiled in the later Middle Ages from Munster annals; manuscript of the 17th century). A Munster annal with a Mac Carthaig and Desmond slant, giving for the years around 1200 the kings of Desmond and Thomond, their wars with each other and with the English of Cork and Limerick, and the castles the settlers were building. Read online
  • The History of William Marshal, Anonymous (a poet called John, writing for the Marshal family) (about 1224 to 1226). A knight's view of the Angevin succession: the council at Vaudreuil in April 1199 where the Marshal and Hubert Walter argued for John over Arthur, the Marshal's crossing to secure England, John's coronation, and the Marshal's part in Normandy in 1199 and 1200 as holder of Longueville and Orbec and a go-between with Philip. Read online

7 more in the sources library for The British Isles.

Sources and studies

  1. G. H. Orpen, Ireland under the Normans, vols 1-2 (1911), Internet Archive

Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.