suey on Family Tree Circles

I am researdhing family history, so far I have found my ggg grandfather Michael Orwin, he married Isabella Heath, they had 3 children that I am aware of,Michael, Noble (gg grandfather) and Isabella. would love to go back further and also know about Isabella Heath and her family, gladly accept help and share all information I have

timothy cusack was my 2x gr grandfather he arrived in tasmania in august 1852 from county clare after being sentenced to 7 years for killing a sheep, daughter elizabeth was my great grandmother, who married john windley, also decendant of a convict, their daughter charlotte was my grandmother who married wentworth irwin, my fathers father. any information regarding timothy, eg parents or siblings would be much appreciated.
sue irwin

i am researching my family tree, looking for irwins from newcastle on tyne 1750-1850 circa, now know noble irwin was born 1817 newcastle on tyne, a convict sent to sydney on lord lyndoch 4 1838 i have all following history , i am looking for information about his father michael and mother mary any siblings or other information