"Hawaii, Honolulu Passenger Lists, 1900-1953," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QV9Z-SNW5 : 16 March 2018), Oskar Rothschild, 1909; citing Ship , NARA microfilm publication A3422 (Washington D.C.: National Archives and Records Administration, n.d.).
The Houston Chronicle, Aug. 3, 1909. "The tragic suicide of Baron Oskar Rothschild, youngest son of the Vienna branch of the famous family of bankers, brought to a sudden climax the romance of Miss Olga Menn. Miss Menn is the daughter of a well known Chicago physician, Dr. Rudolph Menn. The romance had its beginning six weeks ago... The baron cabled his father for permission to marry... This was not given... flatly denied him permission to marry... he sent a bullet into his brain."