Hi Leigh
I found a marriage for George TITLEY to Eliza WOOD (nee NORMAN) in 1862.
Pioneer Index. Victoria 1836-1888
Surname: TITLEY
Given Names: George
Event: M
Spouse Surname: WOOD
Spouse Gvn Names: Eliza
Year: 1862
Reg Number: 2161
So William would have only known Eliza as his mother?
These records show a stepsister of William.
Pioneer Index. Victoria 1836-1888
Mary WOOD
Event: B
Father: John
Mother: Eliza NORMAN
Birth Place: COLL
Year: 1854
Reg Number: 188
Mary WOOD
Event: D
Father: John
Mother: Eliza Titley NORMAN
Age: 11
Birth Place: COLL
Year: 1865
Reg Number: 9849
Rhonda