Morgallion (Irish: Machaire Gaileang, "plain of the Gailenga") is one of the baronies that comprise county Meath, Ireland.^[1][2]

In 1172 King Henry II of England granted the Lordship of Meath to Hugh de Lacy to hold as King Murrough O Melaghlin held it. Once established de Lacy proceeded to divide up his newly acquired territory into feudal grants to his chief followers. He granted the territory of the Gaileanga-Mor sept (the lands of Magherigalon, later to be known as the Barony of Morgallion) to Gilbert de Angulo, who had arrived from Wales in 1171.^[3] The caput of the barony was at Nobber where de Angulo constructed a Motte close to the site of an earlier ecclesiastical site.^[4][5]

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