Ó Lochlainn and Ua Lochlainn are Irish surnames. They are patronymic forms of the personal name Lochlann.Bannerman (1998) p. 29 n. 1; Laughlin Family History (n.d.); O'loughlin Family History (n.d.). The surnames have been borne by several Irish families, such as the Uí Lochlainn,Ó Murchadha (1993) p. 69; Ó Cuív (1988) p. 85. and the Meic Lochlainn.Byrne (2001) pp. xxxv, xxxvii; Ó Murchadha (1993) p. 69.
A variant form of Ó Lochlainn is Ó Lachlainn.de Bhulbh (1997) p. 75. There are numerous Anglicised forms of Ó Lochlainn, such as: Laughlin,Laughlin Family History (n.d.) Lock, Locke,de Bhulbh (1997) p. 251. Loftus,Loftus Family History (n.d.) Loughlin,de Bhulbh (1997) p. 253. O'Loghlen, O'Loghlin,de Bhulbh (1997) p. 323. O'Loughlan,de Bhulbh (1997) p. 324. and O'Loughlin.de Bhulbh (1997) p. 324; O'loughlin Family History (n.d.).
People with the surnames
Ó Lochlainn Colm Ó Lochlainn (1892–1972), printer, typographer, and traditional Irish Uilleann piper.
Ua Lochlainn Domnall Ua Lochlainn, High-King of Ireland. Muirchertach Mac Lochlainn, High-King of Ireland.
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