Note: Although the Río Senguer department falls outside of the geographical area covered by the PatBrit web-site, these names (taken from official land records) may be useful to locate settlers who later moved into or had relations with regions further south. The term "English" is used consistently to include Scots.
| 1906 | Brooks, John | English | Valle Huemules |
| 1910 | Cunningham, George | Irish | Lago Blanco |
| 1910 | Cunningham, Jorge Patricio | North American | Lago Blanco |
| 1919 | Doran, Guillermo Willie | Irish | Lago Blanco |
| 1906 | Gilmour, Diego | Argentine | Pampa de Apeleg |
| 1915 | Grier, Guillermo + Ricardo | Argentine | Pampa de Apeleg |
| 1915 | Hogland, Sander | English | Lago Blanco (left 1916) |
| 1912 | Hudson, Guillermo | English | Valle Huemules (left 1916) |
| 1915 | Johnston, James | n/a | Pastos Blancos |
| 1913 | MacLeod, Angus | English | Arroyo Verde |
| 1916 | MacLeod, Angus | English | Lago Blanco (murdered 1920) |
| 1916 | MacPhail, Angus | English | Pastos Blancos |
| 1918 | Macdonald, Alejandro | English | Arroyo del Gato |
| 1917 | MacDonald, Angus | English | Arroyo Verde |
| 1915 | Macdonald, Ricardo Lachlan | English | Pastos Blancos (left 1918) |
| 1908 | Noble, John | North American | Valle Huemules |
| 1896 | Richard, Guillermo | Welsh | upper reaches of Río Mayo |
| 1917 | Small, Winand | Boer | northwest C. Ensanche Sarmiento |
| 1916 | Stewart, Thomas | English | El Cantao |
| 1916 | Sutherland, Donald | English | Lago Blanco |
| 1913 | Thomas, Williams | Welsh | headwaters of Río Mayo |
| 1918 | Urquhart, Alejandro | English | upper reaches of Río Senguer |
| 1917 | Watson, Guillermo Enrique | Boer | Pampa de Apeleg |
| 1914 | Watt, Alejandro | English | Arroyo del Gato |