Willem Michel Louis Cohen and Sophia Clementine Jacobs had two children.
Bertha Clementina Cohen, born May 21 1912 in Semarang, and
Willy Louis Cohen, born September 10 1916 in Semarang.
Source: https://www.openarch.nl/hga:371F570D-00FC-4618-8A8E-C527675E44AA