Family with parents
father Parents Gijsbertus HelenusSlotboom Jacoba Johanna Magdalenade Roos	Gijsbertus HelenusSlotboom 1880–1944
mother Parents (unknown)	GrietjeKannegieter 1878–1936
elder brother Family JantinaRegtop	Gijsbertus HelenusSlotboom 1907–1953
elder sister Family (none)	Johanna Heligonda JacobaSlotboom