I am not related, just trying to help.

This appears to be his death and his baptism.

First name(s) LEONARD GRAHAM
Last name SILVER
Gender Male
Birth day 11
Birth month 4
Birth year 1920
Age -
Death quarter 3
Death year 1972
District PETERBOROUGH
County Northamptonshire
Volume 4B
Page 1052
Country England
Record set England & Wales deaths 1837-2007
Category Birth, Marriage, Death & Parish Records
Subcategory Deaths & burials
Collections from Great Britain



First name(s) Leonard Graham
Last name Silver
Baptism year 1920
Baptism date 2 May 1920
Baptism place Barnby Dun
Denomination Anglican
Father's first name(s) Harly Graham
Father's occupation Farm Labourer
Mother's first name(s) Daisy
Residence Barnby Dun
County Yorkshire (West Riding)
Country England
Record set Yorkshire Baptisms
Category Birth, Marriage, Death & Parish Records
Subcategory Births & baptisms
Collections from Great Britain
the death certificate could help, as it could show a relative who registered the death.

This appears to be the marriage. Daisy could have been the name that she was known as, but her real name may have been Elizabeth. I have two relatives, who are both known by completely different names, to those they were registered with.
The marriage certificate will give the names of the fathers of the bride and groom, and their addresses at the time, which could lead to you finding them on census records.

First name(s) HARLIS G
Last name SILVER
Marriage quarter 4
Marriage year 1916
Registration month -
MarriageFinder™ HARLIS G SILVER married
ELIZABETH C FIELD
Spouse's last name FIELD
District BRENTFORD
District number -
County Middlesex
Country England
Volume 3A
Page 360
Record set England & Wales marriages 1837-2008
Category Birth, Marriage, Death & Parish Records
Subcategory Marriages & divorces
Collections from Great Britain

These children all had a mother with the maiden name of Field.

SILVER HARLIS A 1917 — 1917 England & Wales births Brentford, Middlesex, England

SILVER LEONARD G 1920 — 1920 England & Wales births Doncaster, Yorkshire, England

SILVER VERA 1926 — 1926 England & Wales births Doncaster, Yorkshire, England