Robert Henry August Dahm was one of 13 children born to John Stephen Theodore Dahm, b. 13 Feb 1947, Germany, d. 1894, Sheldon, ND, and Bertha Caroline Fredrica Dahm, nee Voight, b. 4 Jul 1849, Naugarten, Uckermark, Brandenburg, Germany, d. 11 Dec 1915, Sheldon, ND.

His siblings were:

1. Gustav Carl Richard Dahm, b. 12 FEb 1870, Wausau, Marathon, Wisconsin, d. 30 Oct 1928, Spokane, Spokane, Washington. Wife: Florence Eva Schossow

2. Herman Carl Albert Dahm, b. 8 Aug 1871, Wausau, Marathon, Wisconsin, d. abt. 1873, Wausau, Marathon, Wisconsin

3. Otto Email Robert Dahm, b. 1 Jul 1873, Wausau, Marathon, Wisconsin, d. 20 Jan 1943, Elk, Spokane, Washington. Wife: Lily Mae Weymouth

4. Clara Emma Matilda Dahm, b. 12 Dec 1874, Wausau, Marathon, Wisconsin, d. 2 Sept 1876, Wausau, Marathon, Wisconsin

5. Anna Emma Elizabeth Dahm, b. 27 May 1876, Wausau, Marathon, Wisconsin, d. 17 Sept 1955, Enderlin, Cass, ND Husband: Martin Kaspari

6. William Albert Robert Dahm, b. 27 Oct 1877, Wausau, Marathon, Wisconsin, d. 9 Dec 1877, Wausau, Marathon, Wisconsin

7. Robert Henry August Dahm

8. Margaret Emma Matilda Dahm, b. 7 Nov 1880, Watson, Cass, ND, d. ? Denver, CO? Husband: Wonzo Shaw

9. Emma Maria Ida Dahm, b. 6 Aug 1882, Watson, Cass, ND, d. 17 Apr 1968, Spokane, Spokane, Washington Husband: Harold Sherwood Jewell

10. John Albert Dahm, b. 7 May 1884, Watson, Cass, ND, d. 25 Feb 1965, Cass, ND Wife: Amanda Solboken

11. Ella Maria Dahm, b. 5 Jan 1886, Watson, Cass, ND, d. 1886, Sheldon, Ramsey, ND

12. George Albert Dahm, b. 16 Sep 1887, Watson, Cass, ND, d. 1948, Sheldon, ND Wife: Anna O. Froemke

13. Martha Erinstina Dahm, b. 20 Sept 1890, Watson, Cass, ND, d. ? Husband: George Lillicrop, Jr.