The following table shows the incidence, and areas of highest concentration, of the most frequent family names (from a total of 361 unique names and 1618 individual householders) enumerated in Creggan Parish in the 1901 Census of Ireland. |
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| No. of families | No of townlands | Townlands with highest | |
| Family Name | in Parish | with this family | number of families |
| Hughes | 54 | 20 | Crossmaglen (8), Ummericam Johnston (6) |
| Murphy | 45 | 19 | Annaghgad (7), Carnally (7) |
| Quinn | 42 | 19 | Cullyhanna Little (10) |
| Hearty | 42 | 13 | Cregganbane (11) |
| Kelly | 37 | 17 | Dorsey (8), Crossmaglen (6) |
| Mackin | 32 | 4 | Tullinavall (16), Dorsey (13) |
| McShane | 29 | 19 | Sheetrim (3), Annaghmare (3) |
| McCoy | 22 | 11 | Moybane (9) |
| Duffy | 22 | 10 | Teer (7) |
| Conlon | 22 | 14 | Annaghmare (4) |
| Carragher | 21 | 13 | Cappagh (5), Cullyhanna Big (5) |
| McKeown | 20 | 12 | Lissaraw (4) |
| Grant | 20 | 11 | Crossmaglen (5), Lissaraw (4) |
| Callaghan | 20 | 13 | Lurgancullenboy (4) |
| McMahon | 19 | 11 | Cullyhanna Big (5) |
| Burns | 19 | 11 | Clarnagh (3), Cregganbane (3) |
| Watters | 18 | 7 | Clonalig (7) |
| McCreesh | 18 | 11 | Carrickamone (4) |
| McCabe | 18 | 10 | Tullyard (5) |
| McArdle | 18 | 10 | Crossmaglen (4), Glasdrumman (3), Mounthill (3) |
| Donnelly | 18 | 7 | Carnally (4) |
| McNulty | 17 | 10 | Carran (3), Drumlougher (3) |
| Morris | 16 | 6 | Creevekeeran (11) |
| McGeeney | 16 | 10 | Clonalig (5) |
| Lennon | 16 | 10 | Crossmaglen (4), Glasdrumman (3), Mounthill (3) |
| Keenan | 16 | 7 | Rathkeelan (5) |
| Hanratty | 15 | 7 | Rathkeelan (5) |
| Boyle | 15 | 9 | Monaguillagh (3), Tullydonnell Gage (3) |
| Loye | 14 | 5 | Ummeracam Ball (5) |
| O'Hare | 13 | 8 | Crossmaglen (4) |
| McCann | 13 | 10 | Carnally (3) |
| Harvey | 13 | 9 | Drummuckavall (3) |