Kurt Hensel
Kurt Wilhelm Sebastian Hensel was a German mathematician born in Knigsberg.
Hensel was born in Knigsberg, East Prussia , the son of Julia and Sebastian Ludwig Felix Hensel, who was a landowner and entrepreneur. His paternal grandparents were painter Wilhelm Hensel and composer Fanny Mendelssohn. Through his grandmother, he was a descendant of the philosopher Moses Mendelssohn. Hensel was the brother of the philosopher Paul Hensel. Both his paternal grandmother and his mother were from Jewish families that had converted to Christianity.
Source: Wikipedia