Henry married Lilly Landmeier on 13 Mar 1904 in Bensenville, DuPage County, Illinois, USA. Lilly (daughter of Herman H. Landmeier and Lina Reker) was born on 15 Dec 1884 in Elk Grove, Cook County, Illinois, USA; died in Nov 1967 in Arlington Heights, Cook County, Illinois, USA; was buried in Nov 1967 in Mount Emblem Cemetery, Elmhurst, DuPage County, Illinois, USA. [Group Sheet] [Family Chart]

1. Grace Knaack was born in 1904 in Elk Grove, Cook County, Illinois, USA; died in Oct 1976 in Arlington Heights, Cook County, Illinois, USA; was buried in Oct 1976 in Elk Grove Cemetery, Arlington Heights, Cook County, Illinois, USA.
2. Esther A. Knaack was born on 2 Jan 1908 in Elk Grove, Cook County, Illinois, USA; was christened on 9 Feb 1908; died in Jan 1986 in Bensenville, DuPage County, Illinois, USA.
3. Herbert C. Knaack was born on 21 Sep 1912 in Elk Grove, Cook County, Illinois, USA; was christened on 20 Oct 1912; died on 22 Oct 1995 in Elk Grove, Cook County, Illinois, USA.