Francis was born in 1857. Registrar entry sighted and records only one first name. Original birth record not available.

Electoral rolls from 1905 to 1914 record Francis Joseph and other names and addresses support this is the correct individual. 

In 1930:

1. Francis Joseph was recorded on one son's marriage certificate.
2. Francis Joseph was recorded on 2 children's birth amendment forms. These were signed Francis Joseph.
3. Francis was recorded on 2 children's birth amendment forms. These were signed Francis.

As he has recorded his name as Francis Joseph and used it regularly, do I change his actual name to Francis Joseph or do I record Francis Joseph as an Also Known As?