From Lotte's daughter:

My mother emigrated to Palestine (British mandate before it became Israel) through the Jewish Youth Aliyah in Germany. She married my father, Paul Kantorovitz born in Danzig, in 1942 in Cairo and he served in the British RAF becoming a lieutenant. Nearly all of his family was murdered. I was born in Cairo. We emigrated to the U.S. in 1947. We were sponsored by my mother's aunt and her husband, Eugen Flegenheimer. We came to NY and lived in Queens until we moved to NJ. My mother worked as a physical therapist in NJ the rest of her life; my father moved to Switzerland where he continued to practice law where he had received his law degree from Geneva.