| Mangan | numerous: Munster, Leinster, Connacht, especially the South East and S Midlands. Ir. Ó Mongáin, from mongach, long-haired. There were three septs in Limerick, N Connacht and Tyrone, the latter almost extinct. IF. |
| Mongan | Quite numerous: Galway-Mayo, Donegal etc. Ir. Ó Mongáin, from mongach, long-haired. A sept of Mayo. Also synonymous with Mangan. |
| O Mongáin | Mangan, Mongan: líonmhar sa deisceart - baineann Mongan le Gaillimh-Maigh Eo- Tír Chonaill. Bhí clanna i Luimneach, Maigh Eo & Tír Eoghan. Tá Baile Uí Mongáin in aice le Dromcollahair agus b'as Seanaghualainn do James Clarence Mangan (1803-48), file. Tá fíor-bheagán díobh fágtha i dTír Eoghain, mar a rabhadar ina n-airchinnigh ag Tearmonn Ó Mongáin fadó. IF & SGG. |
DEDs where Mongan and a second surname are found together
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