ÃÂ Lochlainn and Ua Lochlainn are Irish surnames. They are patronymic forms of the personal name Lochlann. The surnames have been borne by several Irish families, such as the UÃÂ Lochlainn, and the Meic Lochlainn.
A variant form of ÃÂ Lochlainn is ÃÂ Lachlainn. There are numerous Anglicised forms of ÃÂ Lochlainn, such as: Laughlin, Lock, Locke, Loftus, Loughlin, O'Loghlen, O'Loghlin, O'Loughlan, and O'Loughlin.