My grandfather

Joseph van der Heijm married twice. His first marriage was with Metje Cornelia Verploeg‏‎ on 27 sep 1916 in Rotterdam. This marriage ended when Metje died on 12 jan 1934 in Rotterdam.
They had 4 children:
Schoontje van der Heijm (who died when less then a year old on 17 nov 1916 in Rotterdam)
Jacob van der Heijm, Sera Bets van der Heijm and Meijer van der Heijm.
He remarried on 5 sep 1934 Rotterdam a Joanna Philippina Kort. They had a daughter, Jeanne van der Heijm born on 31 January 1936 in Rotterdam. This daughter being my mother.