Children |
| 1. Emerson Otis COSTAIN, b. 13 Oct 1926 d. 3 Apr 1999 (Age 72 years) |
| 2. Everett L. COSTAIN, b. 1928 d. 2005 (Age 77 years) |
| 3. Velda M. COSTAIN, b. 13 Jun 1929 d. 20 Jul 2008 (Age 79 years) |
| 4. Thomas Elliott COSTAIN, b. 29 Mar 1931, , Palmer Road, Prince County, Prince Edward Island, Canada d. 22 May 2009, , Prince County Hospital, Summerside, Prince County, Prince Edward Island, Canada, 46.418658,-63.777325 (Age 78 years) |
| 5. Jarvis COSTAIN |
| 6. Goldie Ethyl COSTAIN, b. 29 Oct 1934, , Miminegash, Prince County, Prince Edward Island, Canada d. 19 Mar 2019, , Maplewood Manor, Alberton, Prince County, Prince Edward Island, Canada (Age 84 years) |
| 7. Nelder COSTAIN, b. 19 Apr 1937, , Miminegash, Prince County, Prince Edward Island, Canada d. 24 Jun 2009, , Western Hospital, Alberton, Prince County, Prince Edward Island, Canada (Age 72 years) |
| 8. Major Myril COSTAIN, b. 1938, , Prince Edward Island, Canada d. 6 May 2012, , Western Hospital, Alberton, Prince County, Prince Edward Island, Canada (Age 74 years) |
| 9. Aletha COSTAIN, b. 1940 d. 1999 (Age 59 years) |
| 10. Lucina Viola COSTAIN, b. 3 Jul 1941, , Miminegash, Prince County, Prince Edward Island, Canada d. 14 Dec 2020, , Palliative Care; Maplewood Manor, Alberton, Prince County, Prince Edward Island, Canada (Age 79 years) |
| 11. Brenda Olive COSTAIN, b. 14 Oct 1942, , Miminegash, Prince County, Prince Edward Island, Canada d. 5 Sep 2020, , Maplewood Manor, Alberton, Prince County, Prince Edward Island, Canada (Age 77 years) |
| 12. Darrell James COSTAIN, b. 8 Dec 1946 d. 2 Aug 2018, , a nursing home, Fort MacLeod, Alberta, Canada (Age 71 years) |
| 13. Vernon COSTAIN |
| 14. Hedley COSTAIN |
| 15. Gary COSTAIN |
| 16. Darris COSTAIN |
|