Joseph Arzt Chicago, Cook, IL abt 1870  Wisconsin  White  Head   
Mary Arzt Chicago, Cook, IL abt 1874        Wife   
Theodore Arzt Chicago, Cook, IL abt 1901        Son 
Loretta Arzt Chicago, Cook, IL abt 1903        Daughter   
Richard Arzt Chicago, Cook, IL abt 1905        Son   
Magdalen Arzt Chicago, Cook, IL abt 1907        Daughter   
Evelyn Arzt Chicago, Cook, IL abt 1907        Daughter   
Joseph Arzt Chicago, Cook, IL abt 1909        Son   
Geneve Arzt Chicago, Cook, IL abt 1911        Daughter   
Image source:    Year: 1930; Census Place: Chicago, Cook, Illinois; Roll: 453; Page:  ; Enumeration District: 841; Image: 212.0.
Name:    Joseph Arzt 
In 1910  there is a John Arzt who seems to be a likely match.
Name:    Joseph Arzt (in 1900):    Chicago Ward 8, Cook, Illinois 
Image source:    Year: 1900; Census Place: Chicago Ward 8, Cook, Illinois; Roll: T623 252; Page: 14B; Enumeration District: 200. 
PM me (with an email address) if you want the original images, and I will try to send them
Pauline