This is Dirk Jansz' brother Hendrik Jan Jansz. Hendrik died in a Japanese internment camp.

Translation of left side:
War Victim
Has reached the age of 65
Born on the 11th of November 1879 in Oude Wetering
Died on 7 July 1945 at Samarang Kamp
Bangkong,
Translation above cross:
Dutch Field of Honour Kalibnateng at Samarang Box/Reef/Number V-1 54