Surname from marriage record of his wife’s (Sarah) second marriage on the 30 March 1885, that marriage to William Roberts.

First given name, date and place of marriage, occupation, from the Liverpool, England, Church of England Marriage records found in September 2023:
Marriage Date: 27 May 1883
Marriage Place: St Anne's, Stanley, Lancashire, England
Groom: Ralph Johnson
Groom's Marriage Age: Full, Bachelor
Groom's Profession: Machinist
Groom's Residence: 55 Moorgate Street
Groom's Father: William Johnson
Groom's Father's Occupation: Rope Maker
Bride: Sarah Marsh
Bride's Marriage Age: Full, Widow
Bride's Residence: Moorgate Street
Bride's Father: William Brown
Bride's Father's Occupation: Cart Owner

Date and place of death, estimated year of birth, from the England & Wales, Civil Registration Death records found in September 2023:
Name: Ralph Johnson
Age: 26 [Born circa 1858]
Registration Quarter Apr-May-Jun 1884
Death Registration Place: West Derby, Lancashire, United Kingdom
Inferred Death Place: Lancashire, United Kingdom