In 1910 Census, Henry Derenthal [son of Ferd and Dorothy] appears as living at the Armitage Orphanage, so Ferd and Dorothy shoudl be deceased. Neither appears in the 1910 Census.
Noted events in his life were:
• Appearance in Document: Passenger List, 15 Jun 1885, New York City, New York, United States. Ferd Derenthal ia 18, German, sailed from Bremen, Germany on Ems, arrived in New York on 15 Jun 1885. (New York Passenger Lists at Ancestry.com)
• Appearance in Document: City Directory, 1889, San Francisco, San Francisco Co, CA. Ferd Derenthal is a bartender at George Korner at 1202 Pacific (San Francisco Directories at Ancestry.com)
• Census, 1900, San Francisco, San Francisco Co, CA. Ferdinand Derenthal is 31, b June 1868, b Germany, parents b Germany, immigrated 1890, naturalized citizen, driver for brewery, married 8 years to Dorothy B (30, b Jan 1870, b Germany, parents b Germany, immigrated 1894, 2 children, both living), dau Theresa (8, b Aug 1891, b CA), son Henry (3, b Sept 1896, b CA), mother-in-law Herma Berlmer (65, b Sept 1834, b Germany, parents b Germany, immigrated 1894, widow, 5 children, all living). (4503 23rd Street, District 138, San Francisco, San Francisco Co, CA, sheet 3A, family 57)
Ferdinand married Dorothy BEHLMER, daughter of Unknown BEHLMER and Herma UNKNOWN, circa 1892. (Dorothy BEHLMER was born in Jan 1870 in Bremen, Germany and died between 1900 and 1910 in California, United States.)