Charles married Mavis Addie in 1924 in Regina, Saskatchewan, Canada. Mavis (daughter of Wiliam Addie and Elizabeth Munton) was born in 1897 in Blaenavon, Wales, United Kingdom; died on 27 Jun 1987 in Regina, Saskatchewan, Canada; was buried in Riverside Memorial Park Cemetery, Regina, Saskatchewan, Canada. [Group Sheet] [Family Chart]

1. Dr. Charles Beverly Koester, OC was born on 13 Jan 1926 in Regina, Saskatchewan, Canada; died on 1 Feb 1998 in Kingston, Ontario, Canada; was buried on 5 Feb 1998 in Cataraqui Cemetery, Kingston, Ontario, Canada.
2. Vera May Koester was born on 5 Mar 1930 in Regina, Saskatchewan, Canada; died on 16 Nov 2018 in Calgary, Alberta, Canada; was cremated in Cremated.