| Father | Klaas Jans Mekkes (1822 - 1893) |
| Mother | Willemtien Mary Willems (1838 - 1919) |
| Sibling | John Mackus (1868 - 1924) |
| Sibling | Bowina Winnifred Mackus (1876 - 1926) |
| Sibling | Edith Mackus (1876 - 1945) |
| Sibling | Hiram Mackus (1873 - 1954) |
| Sibling | Herman Mackus (1871 - 1872) |
| Sibling | Theodore Mackus (1870 - 1954) |
| Sibling | Henry Mackus (1877 - 1947) |
| Sibling | Jane Mackus (1868 - 1920) |
| Sibling | Gezena Zena Mackus (1866 - 1923) |
| Sibling | Albert Mackus (1878 - 1946) |
| Sibling | Monce Mackus (1863 - 1920) |
| Sibling | Annie Mackus (1883 - 1959) |
| Sibling | Benjamin Mackus (1860 - 1948) |
| Sibling | Maggie Mackus (1857 - 1940) |