| Name | Location | Date | Member # |
| LAMONT | Cookstown | Any | B0833 |
| LAMONT | Ballymoney | 1800-present | B1763 |
| LAMONT | Coagh, Co Londonderry | Any | B0832 |
| LANGTRY | Belfast | 1800-1875 | A2706 |
| LARMOUR, MARY | Belfast | 1925 | A2681 |
| LATIMER | Derryheen, Deredis, Cavan | any | A1552 |
| LATIMER | Moneymore & America | Any | B0833 |
| LAUGHLIN | Antrim town | Mid 1800's | B1697 |
| LAW | Belfast | 1900+ | B0699 |
| LEARY | Belfast | Pre 1900 | A2611 |
| LEGGAT | Co Down | Pre 1840 | A2719 |
| LENNON | Co Tyrone | 1840-80 | A2655 |
| LENNOX | Aghadowey | Pre 1837 | B1596 |
| LESLIE | Derry | 1890-1990 | A2740 |
| LIDDY | Belfast | 1830+ | B0412 |
| LIGHTBODY | Balloo & Ballygrainey | Pre 1850 | A2600 |
| LIGHTBODY | Killinchy/Co Down | Pre 1800's | A2600 |
| LITTLE | Boardmills | Pre 1900 | A2797 |
| LITTLE | Tyrone / Londonderry | pre 1875 | B1944 |
| LITTLE | Carnaguiltaugh | 1750-1800 | B1772 |
| LIVINGSTONE | Gransha, Upper Moybrick, Finnis, Dromara | pre 1853 | A2675 |
| LOCKHART/LOCKHARD | Donacloney | Pre 1900 | A2611 |
| LOGAN | Londonderry | 1911-50 | B1859 |
| LOGAN | Taughboyne, Co Donegal | Pre 1930 | B1859 |
| LONG | Tyrone | 1830-1900 | B1920 |
| LOVE | Tyrone, Derry & Donegal | pre 1850 | B1458 |
| LOWNDES | Tamnamoney, Coleraine | Pre 1850 | B0918 |
| LYNAS | Belfast | 1800-now | A2706 |
| MACAULAY, Alexander | Antrim/Down | circa 1907 | A2715 |
| MACAULAY, Chancellor Kennedy | Antrim/Down | circa 1899 | A2715 |
| MACAULAY, Dorothy | Antrim/Down | circa 1911 | A2715 |
| MACAULAY, Elizabeth | Antrim/Down | circa 1904 | A2715 |
| MACAULAY, John Taylor | Antrim/Down | circa 1892 | A2715 |
| MACAULAY, Robert Cecil | Antrim/Down | circa 1890 | A2715 |
| MAGILL | Holywood | 1800 | A2608 |
| MAGOWAN | Carrickfergus | Pre 1800 | B0026 |
| MAGUIRE, MATTHEW | Co Cavan & Monaghan | Pre 1900 | B1756 |
| MAGUIRE | Cavan/Monaghan | Pre 1900 | B1756 |
| MAGUIRE | Derrygonnelly | 1850+ | B1817 |
| MAGUIRE | Tyrone | Pre 1800 | B1403 |
| MAINS | Coleraine & Glasgow | 1800-1920 | B1800 |
| MAKIN/MACKIN | Co Tyrone | Pre 1880 | A2676 |
| MALSEED | Clooney, Ramelton, Donegal | Any | B0396 |
| MANN | Islandmagee | Pre 1800 | B0026 |
| MARGEY | Swatragh | Pre 1900 | B1895 |
| MARRON | Ballymena | pre 1900 | B1943 |
| MARSHALL | Ballynenagh, Moneymore, Londonderry | any | A1552 |
| MARTIN | Belfast | 1800-1850 | A2706 |
| MARTIN | Derry, Belfast | 1890-1990 | A2740 |
| MARTIN | Tranish Island Ferry | 1800-1900 | B1693 |
| MARTIN | Tranish Island, Co Fermanagh | Pre 1920 | B1693 |
| MATHER | Newry | 1800-80 | B1904 |
| MATTHEWS | Armagh | Pre 1840 | A2695 |
| MATTHEWS | Armagh | Pre 1850 | A2695 |
| MATTHEWS | Ballygawley, Inch | 1840 | B1850 |
| MAXWELL | Brookhill/Pettigo | Pre 1900 | B1819 |
| MAYNE | Newtownards | 1800+ | A2757 |
| McAFEE | Co Antrim | Any | B1191 |
| McAFEE | Co Londonderry | Any | B1191 |
| McAFEE | Coleraine & Ballywillin | 1800-1920 | B1800 |
| McALEESE | Co Antrim | 1750-1900 | A2716 |
| McALEESE | Co Londonderry | 1750-1900 | A2716 |
| McALINDEN | Milltown, Lisnacree | Pre 1900 | B1760 |
| McALISTER | Tyrone/Belfast | Pre 1900 | A2797 |
| McALISTER | Ramoan | Pre 1900 | A2875 |
| McALLISTER | Kildress, Cookstown | Pre 1703 | B0918 |
| McANNALY | Inch | pre 1900 | B0699 |
| McANULTY | Down / Armagh | 1800+ | B1754 |
| McANULTY | London | Any | B1754 |
| McARTENEY | Fermanagh | 1750-1800 | A2645 |
| McARTNEY | Fermanagh | 1800-1850 | A2645 |
| McATEER | Warrenpoint | Any | B1758 |
| McAULEY | Co Antrim | Pre 1822 | A2651 |
| McBRIAR | Carrowdore, Co Down | 1840+ | B0631 |
| McBRIDE | Co Down | 1790-1830 | A2803 |
| McBRIDE | Down | Pre 1840 | A2769 |
| McBRIDE | Omagh & Urney | Pre 1900 | B1845 |
| McBURNEY | Knocknagor(e), Gilford | 1800+ | B0631 |
| McCABE | Tullyree, Newcastle | Pre 1900 | B1756 |
| McCAFFERTY | Co Tyrone | 1840's | A1160 |
| McCAFFREY | Ballyconnel/Cavan | 1800-1900 | B1693 |
| McCAMBRIDGE | Co Antrim | Pre 1822 | A2651 |
| McCANCE | Greyabbey | 1800+ | B0069 |
| McCANN | Armagh, Kilmore | Pre 1900 | A2890 |
| McCANN | Dromore, Co Down | 1860's | B1753 |
| McCAUGHERTY | Belfast | Pre 1900 | B1433 |
| McCAUGHEY | Dungannon, Cullenramer | Pre 1900 | B1845 |
| McCLAY | North Co Donegal | Pre 1922 | B1902 |
| McCLEAN | Armagh | Circa 1828 | A2721 |
| McCLELLAND | Any | Any | A2695 |
| McCLELLAND | Garrison, Co Fermanagh | Pre 1800 | A2695 |
| McCLELLAND | Ireland & N Ireland | 1750+ | A2695 |
| McCLELLAND | Magherafelt/Dungannon | 1771-1900 | B1451 |
| McCLELLAND | Moneymore/S.Scotland | 1750-1850 | B1451 |
| McCLELLAND | Scotland | 1500-1750 | A2695 |
| McCLURE | Northern Ireland | 1750-1800 | A2551 |
| McCLURE | South Antrim | Pre 1850 | B1751 |
| McCLURG | Raffrey | pre 1840 | A2813 |
| McCLUSKEY, George | Belfast | b 1812 d 1895 | A1246 |
| McCOLLUM | Co Tyrone | Pre 1900 | B1844 |
| McCOLOM | Co Tyrone | Pre 1900 | B1844 |
| McCOMB | Belfast | 1900+ | B0771 |
| McCOMB | Drumnasoo | Pre 1800 | B0798 |
| McCOMB | Dunmurry | Any | B0798 |
| McCOMB | Laurelvale | Any | B0798 |
| McCOMISKEY | Warrenpoint | Any | B1758 |
| McCONKEY | Newtownards/Bangor | Pre 1900 | A2608 |
| McCORD | Ballynargon | 1840+ | B0771 |
| McCORMACK | Belfast / Dundonald | pre 1860 | A2813 |
| McCORMICK | Ramoan | Pre 1850 | A2875 |
| McCORMICK | Ireland | Circa 1838 | A1409 |
| McCORMICK | Killyleagh, Dromore & Ligoniel | 1800-now | A2339 |
| McCORMICK | Northern Ireland | 1800-75 | B1743 |
| McCORMICK | Portrush & Bushmills | 1800-1920 | B1800 |
| McCOURT | Fermanagh | pre 1915 | B1734 |
| McCOY | Seagoe, Co Down | Pre 1900 | B1714 |
| McCRACKEN | Belfast | 1830+ | B0412 |
| McCRORY | Any | Pre 1920 | B1844 |
| McCULLEN | Northern Ireland | Pre 1860 | A2603 |
| McCULLOM | Northern Ireland | Pre 1860 | A2603 |
| McCULLOUGH | Co Down | 1700-1950 | A1995 |
| McCULLOUGH | Lurgan & Belfast | 1870-80 | B1850 |
| McCUTCHEON | Lisnaskea, Fermanagh | Pre 1914 | B1681 |
| McDOWELL | Carrickfergus | Pre 1800 | B0026 |
| McENHILL | Tattykeel, Omagh | Any | B1845 |
| McEVOY | Down | Pre 1900 | B1756 |
| McEVOY | Grinan, Newry | Pre 1900 | B1756 |
| McFADDEN | Ards Peninsula | 1700-1950 | A1995 |
| McFARLAND | Omagh, Co Tyrone | Any | B1627 |
| McFARLAND | Plumbridge | 1800-1950 | B1591 |
| McFARLAND | Tyrone | Pre 1900 | B1317 |
| McFARLANE | Plumbridge | 1800-1950 | B1591 |
| McFEELEY? | Carrowmenagh & Magilligan | 1860-1900's | A1335 |
| McFREDERICK | Londonderry | Pre 1900 | B1718 |
| McGEENEY | Down | any | B1906 |
| McGHEE | Newtonards | 1780-1850 | A2869 |
| McGILL | Coleraine | Pre 1844 | B1660 |
| McGINTY | Donegal | Pre 1900 | A2732 |
| McGLADERY | Belfast | 1750-1950 | A2750 |
| McGORAN | Belfast | Pre 1900 | B1760 |
| McGOVERN | Ballyhaise, Cavan | 1870 | B1723 |
| McGOVERN | Ballyhaise, Cavan | Pre 1870 | B1723 |
| McGOWAN | Carrickfergus | Pre 1800 | B0026 |
| McGOWN | Carrickfergus | Pre 1800 | B0026 |
| McGUARNAHANEY | Belfast | Pre 1900 | B1756 |
| McHARRY | Co Down | 1700-1900 | A1995 |
| McHENRY | co antrim | Pre 1837 | A2607 |
| McHENRY | Torr, Cushendun | Pre 1900 | B1894 |
| McILHONE | Ireland | Circa 1806 | A1409 |
| McILROY, RACHEL | Belfast | 1880 | A2681 |
| McILVEEN | Raffrey, Co Down | any | B1849 |
| McILWAINE | Tullynadall, Newtownstewart | Any | B1317 |
| McILWRAITH, John | Unknown | c. 1823 | A2702 |
| McKAY, AGNES OR ANN | N Ireland ? | Born 1811 | A2686 |
| McKEAG(UE) | Co Antrim | Any | B1191 |
| McKEAG(UE) | Co Londonderry | Any | B1191 |
| McKEAGUE | Fermanagh | pre 1820 | B1939 |
| McKEE | Portglenone, Northern Ireland | Any | B0396 |
| McKELVEY | Omagh | Any | B1627 |
| McKENDRY | co antrim | Pre 1837 | A2607 |
| McKENNA | Armagh | 1800 | A2670 |
| McKENNA | Clones Parish | Pre 1950 | B1778 |
| McKEOWN | Belfast | 1900+ | B0771 |
| McKEOWN | Cloyfin/Castlecall? | 1900 | B1894 |
| McKEY | Ireland | Pre 1838 | A2606 |
| McKINLEY | Termonmaguirk | Pre 1830 | B1723 |
| McKIRGON | Portstewart | 1816 | A0665 |
| McLAVE | Clones Parish | Pre 1950 | B1778 |
| McLEES | Co Londonderry | 1800-1900 | A2716 |
| McLEISTER | Coleraine | 1850-1900's | A1335 |
| McLOUGHLIN | Roscommon | 1870 | B1755 |
| McMANN | Fermanagh/Monaghan | Pre 1820 | A2769 |
| McMANUS | Kiladroy, Beragh | Pre 1860 | B1723 |
| McMICHAEL | Armoy, Ballycastle | 1830-present | B1763 |
| McMICHAEL | Londonderry | 1800 | B1473 |
| McMILLAN | South Coleraine | 1800-1900 | A0756 |
| McMILLAN | South Coleraine | 1800-1900 | A0756 |
| McMORRIS | Londonderry | Any | B1627 |
| McMULLIN | Newtownards, Co Down | Pre 1840 | A2707 |
| McNALLY | Inch | pre 1900 | B0699 |
| McPARLAND | Newtownstewart | Any | B1317 |
| McRORY | Any | Pre 1920 | B1844 |
| McVITTY | Enniskillen | Pre 1900 | B1816 |
| MEEHAN | Derrygonnelly | 1850+ | B1817 |
| MEEKE | Ballywatt | Pre 1920 | B1894 |
| MELLON | Carrycoghan | Pre 1895 | B1596 |
| MILLAR, MGT | Belfast | 1914 | A2681 |
| MILLAR, WALTER | Belfast | 1910 | A2681 |
| MILLAR, WM | Belfast | 1880 | A2681 |
| MILLAR | Pomeroy/Cookstown | 1850-1900 | B1451 |
| MILLEN | Coleraine | 1800-1920 | B1800 |
| MILLER/AR | Tyrone | 1800's | B1451 |
| MILLER | Pomeroy/Cookstown | 1850-1900 | B1451 |
| MITCHELL | Tyrone | 1850-1880 | B1788 |
| MOFFAT (variants) | Co Fermanagh | Any | B1892 |
| MOFFATT | Convoy, Co Donegal | Pre 1900 | B1317 |
| MOFFATT | Donegal | Pre 1880 | B1317 |
| MOFFITT | Dooederny, Fermanagh | pre 1880 | B1939 |
| MOFFIT | Strews, Tyrone | 1800-1950 | B0771 |
| MOIR | Surrey, England | Any | B0396 |
| MONTEITH | Newtownstewart | Any | B1317 |
| MONTGOMERY | Castlewellan, Co Down | About 1855 | B1796 |
| MONTGOMERY | Enniskillen | Pre 1900 | B1816 |
| MONTGOMERY | Lisbellaw | Pre 1900 | B1816 |
| MOORE | Mount Stewart | 1800-1860 | A0359 |
| MOORE | Balteagh, Londonderry | 1800-1870 | A2860 |
| MOORE | Co Down | 1850 | B1472 |
| MOORE | Glasgow & Belfast | Any | B1801 |
| MOORE | Lisdrumchor, Glenanne, Armagh | 1800-1950 | B0771 |
| MOORE | Tullyvin, Cavan | Pre 1870 | B0918 |
| MORGAN | Rathfriland, Co Down | Pre 1840 | A1160 |
| MORRISON | Greyabbey | 1800+ | B0069 |
| MORROW | Derryboy | pre 1840 | A2813 |
| MORROW | Moat Road, Ballymena | pre 1875 | B1944 |
| MORROW | Banbridge | Any | A2713 |
| MORROW | Greyabbey | 1800+ | B0069 |
| MORTIMER | Cornahoule, Derrylin, Co Fermanagh | Pre 1850 | B1693 |
| MORTIMER | Derrylin, Fermanagh | 1800-1900 | B1693 |
| MORTIMER | Finvoy, Co Antrim | 1800-1860 | B1455 |
| MORTIMER | Vow/Finvoy/Antrim | 1800-1860 | B1455 |
| MOWBRAY | Donegal | Pre 1850 | A2792 |
| MULGREW | Bockets | Pre 1900 | B1845 |
| MULLEN | Co Tyrone | Any | B1845 |
| MUNDY | Castlederg | 1850-1900 | A2741 |
| MURPHY | Corravehy, Derrylin, Co Fermanagh | Pre 1900 | B1693 |
| MURPHY | Derrylin, Fermanagh | 1800-1900 | B1693 |
| MURPHY | Newry | 1875 | B1755 |
| MURRAY | Co Down | Pre 1840 | A2719 |
| MURRAY | Derrylin, Co Fermanagh | 1910-20 | B1753 |
| NAWN | Co Antrim | any | B0699 |
| NAWN | Lisbellaw | any | B0699 |
| NEALE | Newtownards, Co Down | Pre 1850 | A2707 |
| NELSON | Co Down | 1800-1860 | A0359 |
| NELSON | Armagh | 1800's | A2673 |
| NEWELL | Co Down | Pre 1900 | A2669 |
| NEWELL | Kilmore, Co Down | pre 1844 | A2675 |
| NICHOLL/NICKLE | Londonderry | 1800-1840 | B1615 |
| NICHOLL | Larne | 1860 | B1622 |
| NOBLE | Fermanagh | Pre 1830 | A2769 |
