This page is a list of all the instances of the family names recorded in the 1766 Census of Creggan This census was compiled by the Rector of Creggan, probably from the Parochial Tythes Book. The Census differentiates between Protestants and Papists. The information is arranged by townland with the exception of those in County Louth which are grouped under the designation of "The five towns". This census is the the base from which patterns of names begin to reappear in later publications. For this publication the names have been combined into a single list and the names in Co Louth have been excluded. The table has been extracted from the detailed lists in the Townland pages. |
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| Surnames | Total | Surnames | Total | Surnames | Total | Surnames | Total | Surnames | Total | Surnames | Total |
| Babe | 1 | Daly | 3 | Hillick | 1 | Maguire | 1 | McGrane | 1 | Owens | 1 |
| Banaghan | 1 | Dixon | 1 | Hillin | 2 | Makkin | 9 | McGraw | 1 | Peery | 1 |
| Bannikan | 2 | Doherty | 1 | Hinimnagh | 3 | Maly | 2 | McGugin | 1 | Powell | 1 |
| Bannikin | 2 | Donaghy | 2 | Hirety | 5 | Marks | 4 | McGunshenan | 2 | Quin | 13 |
| Barry | 1 | Donaldson | 4 | Hugh | 1 | Martin | 1 | McGurk | 1 | Quinn | 1 |
| Bellew | 1 | Donnelly | 4 | Hughes | 1 | McArdle | 16 | McIlroy | 1 | Raverty | 1 |
| Bickerstaff | 1 | Doyle | 1 | Hughs | 10 | McCabe | 2 | McIlvine | 2 | Rice | 2 |
| Boyle | 5 | Duffy | 8 | Hughston | 1 | McCaherky | 1 | McKenna | 4 | Robb | 1 |
| Brannagan | 1 | Dullaghan | 1 | Hullan | 1 | McCann | 1 | McKeone | 3 | Roddy | 1 |
| Breen | 1 | Evers | 1 | Hutcheson | 1 | McCave | 9 | McKinley | 0 | Rodgers | 2 |
| Brown | 1 | Fannin | 1 | Jackson | 1 | McConvall | 2 | McKnight | 1 | Ronaghan | 1 |
| Buchanan | 1 | Farrel | 1 | Jeffers | 2 | McConvoll | 1 | McLeane | 2 | Roony | 3 |
| Burn | 8 | Farrell | 1 | Johnston | 4 | McCooey | 2 | McMahon | 7 | Roundtree | 1 |
| Burns | 2 | Feaghan | 1 | Jordan | 1 | McCreesh | 5 | McManus | 1 | Rowland | 1 |
| Caffry | 2 | Feeghan | 1 | Keane | 5 | McCullagh | 4 | McMaster | 1 | Short | 3 |
| Calaghan | 0 | Fegan | 1 | Keenan | 7 | McDonnell | 3 | McNamee | 2 | Slevlin | 1 |
| Callaghan | 18 | Ferguson | 1 | Keiran | 1 | McEldargy | 1 | McParlan | 1 | Smith | 7 |
| Callan | 2 | Finegan | 2 | Kelly | 18 | McEldreen | 1 | McQuade | 1 | Sonna | 1 |
| Camaway | 1 | Garvey | 1 | Killday | 1 | McElkeran | 1 | McShane | 32 | Stephens | 3 |
| Campbell | 3 | Garvy | 8 | Kirk | 3 | McElroy | 4 | McVeagh | 1 | Stitt | 2 |
| Carragher | 2 | Gernon | 4 | Lamb | 8 | McElterny | 1 | McVeigh | 4 | Stoker | 1 |
| Carroll | 1 | Gollogly | 0 | Lappen | 1 | McEnalty | 1 | Mehan | 1 | Toal | 1 |
| Casey | 2 | Grimes | 4 | Lappin | 1 | McEnolty | 6 | Middleton | 1 | Tomson | 1 |
| Clark | 1 | Gwin | 1 | Laverty | 4 | McEnteggart | 2 | Moan | 4 | Toner | 5 |
| Clinton | 1 | Hale | 6 | Lavill | 6 | McGaghrim | 1 | Moffit | 2 | Tool | 1 |
| Coleton | 1 | Hanratty | 5 | Lennan | 8 | McGaw | 1 | Moley | 9 | Treanor | 1 |
| Conelan | 2 | Harvassey | 3 | Lennon | 4 | McGeaugh | 2 | Morrise | 7 | Trener | 2 |
| Connelan | 1 | Harvassy | 2 | Lindon | 1 | McGee | 2 | Muinagh | 2 | Waters | 1 |
| Coulter | 2 | Harvessey | 1 | Little | 1 | McGeeney | 1 | Mulligan | 2 | Watters | 1 |
| Cowan | 1 | Heal | 4 | Loughran | 0 | McGeeny | 4 | Murphy | 25 | Woods | 6 |
| Crangle | 1 | Heart | 0 | Loy | 3 | McGeone | 1 | Murry | 1 | ||
| Cromy | 3 | Heer | 3 | Loye | 1 | McGill | 3 | Murtagh | 2 | ||
| Cullen | 1 | Henry | 1 | Lurcan | 2 | McGinn | 1 | Nugent | 1 | ||
| Cullin | 5 | Herety | 8 | Mackin | 1 | McGinnise | 2 | O'Neile | 3 | ||
| Cunningham | 4 | Hill | 1 | Maglaughlin | 1 | McGorman | 1 | O'Neill | 1 | ||