== Year of Birth? == 

 Jewish Encyclopedia: 1863 

 This genealogical information says: 24 July 1862 

 Biografisch Woordenboek Nederland and Joods Historisch Museum: 1862 

 Dutchjewry site: 1862 

 The Jewish Encyclopedia contradicts the other sources. Might have been a typo or a scan-error. 
 I change it to 1862. 

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