Hi Leigh
The birth and death of a child in 1896 had the middle name NORMAN/NORMON that I think may be a clue to the parents of William????
George TITLEY and Eliza NORMAN were at Daylesford near Ballarat in 1864. Only two births of daughters recorded for this couple in 1862 and 1864, and a son George (with middle name Norman) born 1866. There is no marriage in the VIC Index for George and Eliza so it appears they came from somewhere else when William was an infant?
ADDED: Found other records with a possible birth for William posted in a new message!
Rhonda