Family name Mac Lochlainn (Mclaughlin 
, Mac Lochlainn ) , in the entire world, is a widespread last name. The last name Mac Lochlainn is habitual in Guernsey, where it is quite a common surname, Cayman Islands, and Ireland (explore the name in all countries). Measured by absolute frequency, it is commonest in the United States, the United Kingdom, and Canada.
| tadhg mac lochlainn Irish historian (b. 1907) |
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pádraig mac lochlainn Irish politician, IE (b. 1973) |
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| antain mac lochlainn Irish writer and translator, GB (b. 1965) |
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| gearóid mac lochlainn GB (b. 1967) |
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| muirchertach mac lochlainn High King of Ireland |
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| niall mac lochlainn King of Cenél nEógain and Cenél Conaill |
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| michael mac lochlainn |
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