Strong of Ireland

I have found so far that thomas and john strong(brothers) were tried and convicted of assaulting a habitat of lisduff along with maher and darby they were transported to tasmania 1850 on board the hydrabad.
Thomas went on to marry bridget maloney and they lived in the cygnet area, his brother did not marry but had a child (FEMALE)
Thomas paid for his mother mary strong to come to tasmania in 1855 she came out on the ship australasia, mary died abt 1870 john her other son was informant on death cert.
We are having a lot of trouble trying to find out where they were actually from at this stage some think it was tullamore ireland but we cannot find anything on them as yet.