Ireland
My DeCoursey line originated in Ireland, as did a large number of those who married into it. Below is a map indicating where various surnames in my tree originated from. Clicking on a surname will take you to the family tree entry for the emigrating ancestor (or oldest known ancestor) in the line. The year of immigration is for entry to the United States, unless otherwise indicated. This is by no means a complete surname list, I will be adding more surnames and info in the coming months.
If anyone has more information concerning the origins of any of these families (especially those listed under "Unknown"), please let me know!
| County | Parish | Surname | Year of Immigration |
| Antrim | McNeil | before 1828 | |
| Clare | Inagh | Cleary | abt. 1888 |
| Templemaley | McInerney | from 1898 to 1910 | |
| O'Brien | before 1851 | ||
| Purcell | did not emigrate | ||
| Inagh | Sullivan | abt. 1888 | |
| Galway | Ballynakill | Mullen | before 1862 |
| Kildare | Rathangan | McCormick | before 1843 | Westmeath | Kilduff | before 1844 |
| Unknown | Clune | abt. 1908 | |
| Coursey | Canada: bef. 1827, USA: abt. 1833 | ||
| McBride | before 1848 | ||
| McManus | Canada: bef. 1849, USA: bef. 1880 | ||
| Murray | abt. 1839 | ||
