| Heinrich Geerds Mammen (1855 - 1943) |
Siebrand (Simon) Algers Oltmanns (1841 - 1916) |
| Henrietta (Hinderika) Ludwigs Beer (1856 - 1943) |
Antje (Anna) Hinderks Jacobs Peterson (1846 - 1932) |
m. Feb 23, 1915, Ogle Co IL
| Rudolph Henry Mammen4 | Jacoba (Coba) Oltmanns12 |
 b. Jun 14, 1889, Ogle Co ILd. May 20, 1983, Ogle Co IL bur. Ebenezer Reformed Church occ. Farmer bp. |
 b. Aug 28, 1888, Ogle Co ILd. Nov 16, 1982, Ogle Co IL bur. Ebenezer Reformed Church occ. bp. |
Children
| Henrietta Mammen Anna Alice Mammen Henry Rudolph Mammen Jennie Marguerite Mammen Melvin Kenneth Mammen Marjorie Mae Mammen Dorothy Olive Mammen Rudolph Mammen Jr Infant Mammen [Stillborn] |