| Surname | Name | Townland | County | Year |
| Armstrong | William | Ballencory | Longford | 1747 |
| Beatty | Ellen | Moydow | Longford | 1812 |
| Brady - see note | Charles | Killoe | Longford | 1827 |
| Burnett | George | Clough | Longford | 1850 |
| Burnett | John | Clough | Longford | 1842 |
| Charters | James | Killeter | Longford | 1758 |
| Charters | James | Aughaboy | Longford | 1788 |
| Charters | Robert | Ballygarive | Longford | 1822 |
| Clinchy | Henry | Freehalman | Longford | 1763 |
| Cluskey | Timothy | Ballymore | Longford | 1811 |
| Clyne | Laurence | Slieve | Longford | 1839 |
| Clyne | William | Moydown | Longford | 1839 |
| Coates | John | Streamstown | Longford | 1777 |
| Cochran | William | Xx | Longford | 1837 |
| Coghlan | Margaret | Ballymahon | Longford | 1758 |
| Colly | Mary | Granard | Longford | 1805 |
| Colum | Francis | Litter | Longford | 1781 |
| Conefry | Terence | Drumlish | Longford | 1834 |
| Connell | Terence | AughaKilmore | Longford | 1777 |
| Connelly | John | Xx | Longford | 1843 |
| Conner | Andrew | Cloonaugh | Longford | 1816 |
| Connor | Elizabeth | Leitrim | Longford | 1811 |
| Conway | George | Ballymahon | Longford | 1782 |
| Conway | Margaret | Ballymahon | Longford | 1789 |
| Conway or Conaway | Bridget | Granard | Longford | 1811 |
| Cook | David | Xx | Longford | 1802 |
| Cooke | Patrick | Cloonach | Longford | 1831 |
| Cormick | Andrew | Ballymahon | Longford | 1755 |
| Cormick | William | Bugnagh | Longford | 1763 |
| Corry | Thomas | Barry | Longford | 1765 |
| Corry | Thomas | Keil | Longford | 1840 |
| Cox | Darby | Cloonumin | Longford | 1824 |
| Cox | Joseph | Granard | Longford | 1771 |
| Cox | Judith | Aughamore | Longford | 1795 |
| Cox | Patrick | Corrygrany | Longford | 1813 |
| Coyle | Hugh | Enough | Longford | 1845 |
| Coyle | Patrick | Ballinacross | Longford | 1839 |
| Coyle | Terence | Corelinan, Granard | Longford | 1826 |
| Coyle | Thomas | Granard | Longford | 1817 |
| Craig | William | Ballyhowlahan | Longford | 1792 |
| Crawford | Alexander | Torboy | Longford | 1781 |
| Crawford | Andrew | Mosstown | Longford | 1811 |
| Crawford | Margaret | Not listed | Longford | 1846 |
| Crawford | Mathew | Torboy | Longford | 1743 |
| Crawford | William | Moneylagon | Longford | 1780 |
| Creage | Robert | Mullow | Longford | 1768 |
| Creed | Michael | Newtownforbes | Longford | 1812 |
| Cruise | Vincent | Ballymahon | Longford | 1787 |
| Cullen | Thomas | Granard | Longford | 1841 |
| Cummins | John | Not listed | Longford | 1793 |