When Gustav Adolph Magnussen was born on 24 February 1868, in Leck, Nordfriesland, Schleswig-Holstein, Germany, his father, Hans Hinrich Magnusen, was 55 and his mother, Ingeborg Cecilia Sonnichsen, was 32. He married Marie Krugger on 22 March 1889, in Chicago, Cook, Illinois, United States. They were the parents of at least 1 daughter. He lived in Los Angeles, Los Angeles, California, United States for about 10 years and Newport Beach, Orange, California, United States for about 10 years. He died on 23 September 1944, in Orange, California, United States, at the age of 76, and was buried in Santa Ana, Orange, California, United States.
Some characteristic forenames: Scandinavian Erik, Alf, Bjorn, Helle, Oivind.
Danish, Norwegian, and North German: patronymic from the personal name Magnus .