Walter William Bywater was born around 1874 in Birmingham, Warwickshire.

Walter married Amy Florence Mould on Sunday 16 February 1896 in Birmingham, Warwickshire.

He had the following children from his marriage to Amy Florence Mould:

- Gladys Amy Bywater	born on 14 October 1900 at Coventry, Warwickshire.
- Walter Bernard Bywater	born on 29 January 1903 at Coventry, Warwickshire.
- Grace Evelyn Bywater	born on 12 September 1904 at Coventry, Warwickshire.
- Harold Bywater	born on 7 September 1907 at Northfield, Birmingham, Warwickshire.
- Kathleen Mary Bywater	born on 9 February 1911 at Northfield, Birmingham, Warwickshire.
- Richard Arthur Samuel Bywater	born on 3 November 1913 at King's Norton, Birmingham, Warwickshire.

Walter was a Clerk.

Details of Walter's death are not known.