Name of a former territory in Leinster from the River Liffey to Arklow, roughly coextensive with modern Co. Wicklow, including the celebrated monastic centre of Glendalough. The area takes its name from the Cualainn, an early people who were there in Ptolemy's time (2nd cent. ad). Crích Cualann is the district of Cualu; Slige Chualann is the way or road to Cualu.
See Henry Morris, ‘Ancient Cualu: Where Was It?’, Journal of the Royal Society of Antiquaries of Ireland, 68 (1937), 280–3.