Hi Lori,
I to am researching my fathers ancestrors. He's mothers name was was Shirley May Duggan, she was born in Adelaide, South Australia, in 1929 and she had two brothers by the names of Gordon and Brian Duggan and three sisters by the names of Heather, Maureen and Marie. She also was livibng in NSW in 1958. I'm not sure if your father is her brother but it's something you might be able to research. Let me know if you have any luck. My email is
sharleyskye@msn.comRegards,
Sharley