| Father | Jens Berthelsen (1862 - 1928) |
| Mother | Ane Cathrine Elise Tofte (1862 - 1920) |
| Sibling | Niels Christian Berthelsen (1887 - 1930) |
| Sibling | Alfred Georg Bertelson (1889 - 1971) |
| Sibling | Otto Bertelsen (1889 - 1889) |
| Sibling | Hans Carl Bertelsen (1891 - 1962) |
| Sibling | Emil Axtell Bertelsen (1893 - 1978) |
| Sibling | Maria Sophia Bertelsen (1895 - ) |
| Sibling | John Holder Bertelsen (1897 - 1966) |
| Sibling | James William Bertlesen (1900 - 1971) |
| Sibling | Clara Bertelsen (1903 - ) |
| Sibling | Freeman Freemont Julius Bertelsen (1905 - 1920) |
| Sibling | Edwin Peter Bertelsen (1907 - 1950) |