Calvagh O'More (Irish: An Calbhach Ó Mórdha;[1] 1540 – 27 March 1618), also known as Callagh, The Calough or Charles,[2] was an Irish-born landowner of noble ancestry.
[5][3] Upon Rory's death at the hands of his brother Giolla Pádraig, it seems that Margaret removed Calvagh and his siblings from Laois.
[6][4][1] His loyalist tendencies were in stark contrast to his brother Rory Oge O'More, a staunch rebel who became Lord of Laois in 1557, and returned to Ireland in the 1560s to lead his clan against the Tudor army.
[7][4] He also possessed part of the ancestral property of Owen Roe O'Neill in County Armagh,[9] and received grants of land in Meath and Dublin.
[1] In 1585, Sir Thomas FitzGerald of Laccagh posted bond for O'More, referencing his "good conduct [and] appearance when called for.