- Township: Embro & West Zorra
- Branch: 1st Depot Battalion, W.O.R.
- Regiment number: 3139955
- Date of birth: July 4, 1896
- Where born: West Zorra Township, Oxford County, Ontario, Canada
- Wars Served: World War I
- Years of service: October 1, 1918 -
- Country enlisted with: Canada
William Vannatter was born July 4, 1896, in the Harrington West area, a son of Simon Vannatter.