For background on how the map was made (and its flaws), see the relevant blog entry.
| Costello | Very numerous: all provinces, especially Connacht and Munster. An Irish patronymic adopted by the Norman Nangles: Mac Oisdealbhaigh from os, a deer and dealbh, likeness, so "deer-like". They were seated in Mayo. Mod.Ir. Mac Coisteala. IF. |
| Mac Coistealbh | Costello: féach Mac Oisdealbhaigh. |
| Mac Oisdealbh | Costello: an-líonmhar: Connachta & Mumhain. Shíolraigh siad ó Oisdealbh, mac le Gilbert de Nangle (de Nógla) a bhí i gConnachta sa 12 céad. Cruthúnas gur gaelaíodh an chlann chumasach sa go luath tar éis an Ionraidh. Bhí muintir Choisteala agus muintir Mhic Dhiarmada in achrann go minic agus is as an dteannas san an eachtra ba bhun leis an amhrán "Úna Bhán" - ceann de mhór-amhráin an domhain. Fréamh: os + dealbh - ar nós fia. Litriú nua: Mac Coisteala. |
| O Coisdealbha | rare: Connacht. Ir.Lang. See Costello. |
DEDs where Costelloe and a second surname are found together
This list shows total 1901 Costelloe households by county.
Click on the county to see detail.
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