Unknown Gilberth
- Bef 1910(
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- 1 Unknown Gilberth [1] d. Bef 1910
- Ella N. MNU b. Abt 1861
- 2 Robert Francis Gilbreth [1.1] b. 22 Jun 1885 d. 8 Jul 1970
- + Martha May Zachary b. 17 Dec 1876 d. 12 Sep 1946
- + Martha May Zachary b. 17 Dec 1876 d. 12 Sep 1946
- 2 Lulu I. Gilberth [1.2] b. Abt 1894
- 2 Eva G. Gilberth [1.3] b. Abt 1898
- 2 Robert Francis Gilbreth [1.1]