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| Keon | rare: scattered. Ir. Mac Eoghain. More usually MacKeon, q.v. |
| MacGeown | numerous: Armagh-Down-Tyrone-Antrim- Monaghan-Louth. Ir. Mag Eoghain. From first name Eoghan. See also Mac Keown. |
| MacKeon | numerous: all areas, especially Midlands & Connacht. Ir. Mac Eoghain, from old first name Eoghan (yew-born), or Mac Eoin (John). See Mac Keown. |
| MacKeown | Very numerous: Ulster generally, Louth etc. Ir. Mac Eoin (Ulster). As Mac Keon. |
| MacOwen | Very rare: Dublin. Ir. Mac Eoghain. See Mac Keon. |
Parishes where Mc Owen and a second surname are both baptised.
This list shows total Mc Owen Roman Catholic baptisms by county.
Click on the county to see detail.