John Leo Lyon was born in 1893 in the Prescot Registration District (Jun Qtr).

John married Mary Parr in 1926 in the Prescot Registration District (Sep Qtr).

He had the following children from his marriage to Mary Parr:

- Henry John Lyon	born on 7 April 1929 at the Prescot Registration District (Jun Qtr).
- John Joseph Lyon	born on 6 October 1931 at the Prescot Registration District (Dec Qtr).
- Joseph Anthony Lyon	born on 21 April 1936 at the St Helens Registration District (Jun Qtr).

Details of John's occupation are not known.

John died when he was 46 years old, in 1939 in the St Helens Registration District (Dec Qtr).