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| MacGann | numerous: Mayo-Galway-Clare, Belfast etc. Ir. Mag Annaidh, also a variant of Mac Cann in Connacht. See also Canney. |
| Magann | fairly rare: Longford, Dublin. Ir. Mag Annaidh, a variant of Mac Cann; see also Canney. SI. |
| Megan | Very rare: Down. Ir. Mag Annaidh (ASG). See also Mac Gann. |
Parishes where a Magann and a second surname married each other.