William married Marguerit Mae Siela on 29 Dec 1929. Marguerit (daughter of William Andrew Siela and Emma Frances Russell) was born on 23 Mar 1907 in Illinois, USA; died on 19 Oct 1995 in Piper, Ford County, Illinois, USA; was buried in Brenton Cemetery, Piper, Ford County, Illinois, USA. [Group Sheet] [Family Chart]

1. John A. Penicook was born on 2 Aug 1934 in La Hogue, Iroquois County, Illinois, USA; died on 8 Dec 2014 in Piper, Ford County, Illinois, USA.
2. William J. Penicook was born on 3 Jul 1936; died on 24 Nov 2014; was buried in Brenton Cemetery, Piper, Ford County, Illinois, USA.
3. Penicook
4. Penicook
5. Penicook