ok ijust found some more out.... the furthest we go back to, is John Donegan, who married Margaret Watson. He Came from Sligo,Ireland. They married in 1804. She was from Scotland. They came out on the ship 'Adelaide 1' in 1855, he was a prison guard. They had 6 Kids, John,William,James,Agnes,George & Thomas(they were all born in Scotland,I think). From James Came 4 boys, William George, John & Albert. From George came 4 kids, Laury, Vern, Reginald(my dad's Dad) & Sybil. My mum & dad R both Donegans, mum comes from Albert(her dad).
i hope this is some help... But if Uwant to go further let me know & i'll try My uncles on their history knowledge!!