Ó Lochlainn

Ó Lochlainn and Ua Lochlainn are Irish surnames. They are patronymic forms of the personal name Lochlann.^[1] The surnames have been borne by several Irish families, such as the Uí Lochlainn,^[2] and the Meic Lochlainn.^[3]

A variant form of Ó Lochlainn is Ó Lachlainn.^[4] There are numerous Anglicised forms of Ó Lochlainn, such as: Laughlin,^[5] Lock, Locke,^[6] Loftus,^[7] Loughlin,^[8] O'Loghlen, O'Loghlin,^[9] O'Loughlan,^[10] and O'Loughlin.^[11]

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.