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| MacMorrough | rare: Sligo etc. Variant of Mac Morrow, q.v. See also Mac Murrough. |
| MacMorrow | numerous: mainly Connacht. Ir. Mac Muireadhaigh (mariner). A name associated with the O'Rourkes of Breifne. |
| MacMurrough | rare: Dublin etc. Ir. Mac Murchadha, mod. Mac Murchú. First name Murchadh, sea-warrior. Three septs, best known being that of Leinster, descended from Murchadh, grand-father of Dermot who introduced the Normans to Ireland. |
| Morrow | Very numerous: mainly Ulster. English toponymic generally; it may stand for Mac Morrow in W Ulster & Connacht. |
Parishes where a MacMorrow and a second surname married each other.
This list shows total MacMorrow Roman Catholic marriages by county.
Click on the county to see detail.