+--Robert Jacob
+--Robert Ephram Jacob (6 Dec 1844-13 Nov 1912)
| +--Amy Liberman
+--Fredrick Leopold Jacob (5 Feb 1889-25 Jun 1962)
| | +--George Freiman
| +--Marie Freiman (5 Jun 1864-26 Mar 1941)
| +--Eva ?
+--Robert Elmer Jacob (3 Dec 1938-)
| | +--Alexander Gross (-BEF 1921)
| +--Emma Marie Gross (27 Sep 1898-25 May 1976)
| +--Dorthea Leitke (-BEF 1921)
Jay Everett Lusk (20 Nov 1962-)
+--Carol Loarine Coen (3 Jan 1940-18 Jun 2004)