Jacob (Jekoff) Hürzle`s Nachfuhr is mentioned 14 times between 1632 and 1657. He died around 1638. His designation in the Stühlingen family tree is 'Z7'.

The early history of the Bickert family appears complex. But the main ancestor was Naphtali Hirtzle) ben Raphael, Bickert, who unfortunately, died in 1633 [R2807; 10.06.1633] . By 1638 his widow had remarried, a man named Jecoff [R402; 03.30.1638]. By 1657 they had taken up residence in Untereggingen [R4323; 08.16.1657]. It is likely that Jekoff took on the role of step father to the two boys Judah (Lehemann) and Samuel (Schmuli), although the relationship can`t have been too close, for there is no `Jacob` among their descendants. .