Joseph was the second child of Joseph Griffin and Ann Budd, whilst Joseph senior was working as a coachbuilder in Clevedon, Bristol. He appears to have been christened the year after he was born and is last listed in the 1870 census, living with his parents in Chesterfield.
He left home to join the merchant navy and never returned. The cadet ship on which he was training was lost in the Bermuda Triangle. He was unmarried.
There is a full list of names on this website and a picture of the memorial in St Ann’s Church, Portsmouth. But it lists him as “Griffon” not “Griffin”-http://www.memorialsinportsmouth.co.uk/churches/st_anns/atalanta.htm#names