did he have any kids?
He had two children.
Barend Joseph Stokvis
 They had two children. 
who was barend joseph stokvis? He was a physician and professor of physiology and pharmacology when was he born? 16 August 1834 where did he study? University of Utrecht so was he a doctor? Yes what degrees did he have? He obtained a doctorate on a dissertation on hepatic glucose production in diabetes has he written any books? UNANSWERABLE did he have any notable achievements? He was one of a number of prominent 19th century Jewish physicians in the Netherlands. apart from working in the field of science what else did he take part in? He was also a patron of the arts. can you please name any artist or artwork that he has patronized? UNANSWERABLE who were his parents? Rachel Wittering and Joseph Barend Stokvis, Jr.
wiki:18242899
Barend Joseph Stokvis [SEP] Personal life
In 1865 he married Julia Elisabeth, the sister of his close friend, the banker and philanthropist A.C. Wertheim. They had two children. He was an ardent swimmer, and wrote poetry under several pseudonyms. He spoke several languages. He died in Amsterdam shortly after returning from a holiday in Ireland, from what was thought to be myocarditis.