Herman Carl Merker was born 29 April 1869 in Germany.
He married Nina Williams. Their son, Foster Williams Merker was born April 29, 1908, in Jefferson County, Kentucky.
In 1910, they lived in Chicago Ward 5, Cook County, Illinois with their children Herman K., Foster W., Mary Louise, brother in law Joseph Williams and two servants Catherine Chalmers and Mary Graedel.
Kentucky Births and Christenings, 1839-1960, database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FWJD-VBK : 4 December 2014), H.C. Merker in entry for Foster Williams Merker, 29 Apr 1908; citing Jefferson County, Kentucky, reference p53; FHL microfilm 1,844,142.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKZK-31T : accessed 3 December 2017), Herman C Merker, Chicago Ward 25, Cook, Illinois, United States; citing enumeration district (ED) ED 1052, sheet 8A, family 222, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 267; FHL microfilm 1,374,280.