1 Frederick Ondaatje + Johanna Christina Louisa Heyzer

........2 Tabitha Ondaatje1839 – 1920 + James Louis Felsinger 1837 - 1920

..................3 Leontine Harriet Felsinger 1869 -

..................3 Alice Mabel Felsinger 1870 – 1924 + Arthur Robert Theodore Arndt1868 - 1935

..................3 Louise Ernestine Felsinger 1872 – 1936 + Peter Frederick Toussaint1870 - 1936

..................3 James Herbert Felsinger 1875 - 1901

..................3 Annette Lenore Felsinger 1877 -

..................3 Percival Louis Felsinger 1879 - 1914

..................3 Guy Spencer Felsinger 1881 – 1912 + Edith Mary Arndt1882 -

............................4 Conrad Guy Arndt Felsinger 1908 - + Helen Marjorie Mack1912 -

......................................5 Patricia Joan Felsinger 1936 -

............................4 Edith Thekla Arndt Felsinger 1911 - + Arthur Lorenz Loos1908 -