Of Emil & Ave's 11 children, 4, not 5, were murdered in the Holocaust. Of those NOT murdered, 1 died in Rotterdam prior to the war in 1932, 1 in Rotterdam in 1948, 1 in Rotterdam in 1956, 1 in Rotterdam in 1964, 1 in 1978 in Rotterdam, 1 in 1969 (location unknown), and 1 in 1993 (location unknown).
Addition