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| Cadwell | rare: Dublin. An English toponymic of various forms such as Caldwell, Caudle, Chadwell, Cadell which see. DBS. |
| Caldwell | numerous: Ulster, N Leinster. English & Scottish, but also anglicisation of the Ir. Ó h-Uarghuis, Ó h-Uairisce (Tyrone) and Mac Conluain (Cavan). MIF. |
| Calwell | Quite numerous: Belfast area. See Caldwell. |
| Cauldwell | fairly rare: Dublin etc. See Caldwell. |
| Coldwell | Very rare: Belfast. See Caldwell. |
| Colwell | fairly rare: Ulster, especially Antrim. Probably connected to Colville but in some areas may be Ir. Mac Conluain. See Caldwell also. |
Parishes where Calwell and a second surname are both baptised.
This list shows total Calwell Roman Catholic baptisms by county.
Click on the county to see detail.