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Map of Gaelic Ireland showing its territory of the Ulaidh or Ulidia (kingdom) circa 900 A.D.

Dunleavy is an Anglicization of the Irish Mac or O'Duinnshléibhe, a surname of ancient Gael royals. Variants of the anglicized surname Dunleavy include Dunlevy and Donlevy among many others. The MacDonlevy/MacNulty were the line of historical kings of Ulidia (kingdom), who last ruled the Gaels' Ulaidh as a Nation.[1] Dunleavy means “fortress on the mountain”,[2] referencing the Dunleavy’s still to this day discernible massive Iron Age fortress Mound at Down (Downpatrick). Notable people with this name include:

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  1. ^ Rev. Patrick Woulfe, Priest of the Diocese of Limerick, Member of the Council, National Academy of Ireland, Irish Names and Surnames, © 1967 Baltimore: Genealogical Publishing Company, in Irish and English, pp. 355, 356 and 518, "... chieftain of Ulidia, who flourished in the 11th century. A remnant of the ancient inhabitants of Ulster. ... The surname has assumed a great variety of forms in Irish ; and corresponding angl. forms are very numerous. ... V. ... Mac an Ultaiġ (At Woulfe p. 319, it is noted that the surname MacNulty is an Anglcization of Mac an Ultaiġ, Ultaiġ is Ulaidh in Irish script.)
  2. ^ G.H. Hack Genealogical History of the Donlevy Family Columbus, Ohio: printed for private distribution by Chaucer Press, Evans Printing Co. (1901), pp 8, 23 (Wisconsin Historical Society Copy)