Maria Dorothea Morthorst
Søger| Louise Dorothea Julie Klein 1837 - 1904 |
 | Peter Anton Petersen 1834 - 1898 |
 | Louise Caroline Petersen 1869 - 1956 |
 | Carl Bernhard Ferdinand Herforth 1866 - 1937 |
 | Lilly Herforth 1891 - 1975 |
| Max William Horn 1885 - 1963 |
| Doreen Horn 1910 - 1999 |
Maria Dorothea Morthorst er 2 x oldemor til Doreen Horn